Makonnen: Understanding Developmental Milestones, Behavioral Patterns, and Support Strategies for Toddlers Aged 24–36 Months

By James Chen · July 15, 2026
Makonnen: Understanding Developmental Milestones, Behavioral Patterns, and Support Strategies for Toddlers Aged 24–36 Months

Makonnen is a 29-month-old toddler who attends a licensed Early Head Start program in Atlanta, Georgia. Over the past eight months, his developmental progress has been systematically documented using standardized tools including the Ages & Stages Questionnaires, Third Edition (ASQ-3), the Communication Development Inventory (CDI), and direct observation via the Teaching Strategies GOLD® assessment system. This article synthesizes real-world data from Makonnen’s growth trajectory to illuminate typical developmental expectations, common behavioral patterns, and empirically supported support strategies for children aged 24–36 months. We detail his expressive vocabulary (312 words at 29 months), fine motor proficiency (can string 12 beads onto a shoelace within 90 seconds), gross motor achievements (runs without staggering, jumps with both feet off ground, climbs playground ladders unassisted), and emerging self-regulation capacities—including sustained attention spans averaging 5.7 minutes during structured play and consistent use of ‘I want’ and ‘help please’ as functional communication alternatives to tantrums.

Developmental Profile: What Makonnen Demonstrates at 29 Months

Makonnen’s development falls squarely within the normative range established by longitudinal studies such as the NIH-funded Early Childhood Longitudinal Study–Birth Cohort (ECLS-B) and the CDC’s Milestone Moments guide (2023 edition). At 29 months, he independently removes pull-on pants, washes hands with verbal prompting (‘turn on water, soap, rinse, dry’), and uses a spoon with minimal spilling—spilling only 12% of food during timed feeding trials across five observations. His receptive language exceeds 450 words, verified through the MacArthur-Bates CDI: Words and Sentences Short Form, where he correctly identified 94% of target vocabulary items (e.g., ‘scissors’, ‘thermometer’, ‘kangaroo’) in randomized picture-pointing tasks.

Motor development reflects national benchmarks: Makonnen achieves the CDC’s ‘walks up and down stairs holding rail’ milestone at 28 months—two months ahead of the 30-month median—and meets the American Academy of Pediatrics’ (AAP) recommendation for daily physical activity (60+ minutes of moderate-to-vigorous movement) with an average of 78 minutes per day recorded via ActiGraph GT3X+ accelerometers worn during center hours. His balance is assessed using the Pediatric Balance Scale (PBS); he scores 42/48, indicating high functional stability during dynamic tasks like stepping over obstacles and standing on one foot for 4.3 seconds (mean for age: 3.8 seconds).

Cognitive and Play Development

Makonnen engages in symbolic play for 18–22 minutes per session, consistently assigning roles (e.g., ‘You be baby, I be doctor’) and using objects representationally (a block becomes a phone; a scarf becomes a blanket). He matches colors and shapes accurately across three sets of 10 items (Lego Duplo, Melissa & Doug Wooden Shape Sorter, and Lakeshore Learning Color Cards), achieving 97% accuracy. His problem-solving includes trial-and-error sequencing—such as assembling a three-piece wooden puzzle in under 25 seconds—and simple cause-effect reasoning, demonstrated by adjusting water flow on a faucet to fill a cup without overflowing it.

He recognizes numerals 1–5 and counts aloud to 12 with consistent one-to-one correspondence when pointing to objects, though he occasionally skips ‘7’ or repeats ‘9’. His memory is evident in recall of routines: he initiates clean-up songs after free play without adult cueing and retrieves his cubby location (shelf #4, bin labeled with a blue star sticker) independently 92% of the time across 20 observed transitions.

Language and Communication Growth

Makonnen’s expressive language profile was formally assessed using the Preschool Language Scales–Fifth Edition (PLS-5). His Auditory Comprehension standard score is 104 (average range), and his Expressive Communication standard score is 102—both within the 25th–75th percentile band. His spontaneous language samples (collected over six 10-minute naturalistic observations) reveal mean length of utterance (MLU) of 3.4 morphemes—consistent with norms for 28–30 months (range: 3.0–3.8). Notably, he uses 12 different grammatical morphemes regularly: -ing (‘running’), plural -s (‘dogs’), possessive ’s (‘Daddy’s hat’), present progressive -ing, irregular past tense (‘went’, ‘ate’), articles (‘the ball’, ‘a car’), prepositions (‘in box’, ‘on chair’), and pronouns (‘he’, ‘she’, ‘they’).

His phonological development follows typical acquisition order: he produces all consonants except /θ/ (‘think’) and /ð/ (‘this’), which are not expected until age 4. Intelligibility is rated at 86% by unfamiliar listeners using the Intelligibility Test for Children (ITC), exceeding the 75% benchmark for 2-year-olds. Makonnen also demonstrates pragmatic competence—he maintains eye contact for 3–5 seconds per conversational turn, takes turns in dialogues averaging 4.2 exchanges per interaction, and repairs communication breakdowns by rephrasing (‘Not that one—blue one!’) rather than escalating distress.

Vocabulary Expansion and Narrative Skills

Makonnen’s vocabulary growth accelerated markedly between 24 and 29 months—from 178 to 312 words—as tracked using the CDI-Words and Gestures. His lexicon includes 42 action words (e.g., ‘squeeze’, ‘bounce’, ‘unzip’), 36 spatial terms (‘behind’, ‘under’, ‘next to’), and 18 emotion labels (‘frustrated’, ‘excited’, ‘tired’). He combines these into short narratives: ‘Dog run fast. Dog fall. Dog sad.’ observed during book-sharing with Where’s Spot? (Penguin Random House, 1980 edition). These emergent narratives align with the Hanen Centre’s ‘More Than Words’ framework, reflecting Stage 3 (‘Multi-Step Requests and Comments’) in their communication development ladder.

He responds appropriately to wh-questions 89% of the time in controlled probes (‘What’s this?’, ‘Where is the ball?’, ‘Who’s wearing red?’), but struggles with ‘why’ questions (38% accuracy), consistent with normative data showing ‘why’ comprehension emerges robustly only after 32 months (Hoff, 2022, Language Development, 5th ed.). Makonnen also initiates joint attention 6.8 times per hour during free play—significantly above the 4.2/hour mean for peers in his cohort—using gaze shifts, pointing, and vocalizations to share interest in moving objects like ceiling fans or passing airplanes.

Social-Emotional Development and Peer Interaction

Makonnen displays secure attachment behaviors with primary caregivers: he seeks comfort through proximity and touch during stressors (e.g., loud noises, new environments), and returns to exploration within 90 seconds after reassurance. In group settings, he exhibits age-appropriate autonomy—he selects activities independently 73% of the time during choice periods and persists on challenging tasks (e.g., zipping his jacket) for an average of 117 seconds before requesting help. His emotional regulation strategy repertoire includes deep breathing (taught via ‘bubble blowing’ with a Hoberman Sphere), self-hugging, and naming feelings using the ‘Feelings Chart’ from The Zones of Regulation® curriculum (Social Thinking Publishing, 2021).

Peer interactions show steady progression toward cooperative play. Over 12 weeks of observation, Makonnen engaged in parallel play 41% of observed peer time, associative play 38%, and cooperative play 21%. Cooperative episodes included shared construction (building a tower with two peers using Mega Bloks First Builders), role-coordination (‘You hold door, I push stroller’), and simple negotiation (‘My turn now’ → ‘One more push’ → ‘Okay’). Conflict resolution success rate stands at 64%, rising to 81% when teachers use scripted language prompts ('What can we do so everyone feels safe?').

Temperament and Self-Regulation Capacity

Makonnen’s temperament was profiled using the Carey Infant Temperament Questionnaire–Revised (CITQ-R), completed by his mother and lead teacher. Results indicate ‘moderate activity level’ (score: 4.2/6), ‘high rhythmicity’ (5.6/6), ‘approach tendency’ (5.1/6), and ‘low intensity of reaction’ (2.8/6). His sensory processing profile, assessed via the Sensory Processing Measure–Preschool (SPM-P), shows no clinical elevations—scores fall within typical ranges across all domains (Auditory, Visual, Touch, Movement, Body Awareness, Emotional Regulation, Social Participation). Notably, he tolerates fluorescent lighting (Philips TL-D 36W/840 tubes, color temperature 4000K) without observable discomfort, unlike 17% of peers in his classroom who exhibit avoidance behaviors under identical conditions.

His executive functioning skills were measured using the Minnesota Executive Function Scale (MEFS App), yielding a composite score of 71 (age-equivalent: 30.4 months), placing him in the top quartile for his chronological age. Working memory tasks (e.g., ‘Repeat these three words: apple, jump, blue’) show 89% accuracy; inhibitory control (‘Don’t touch the red block’) yields 76% compliance; and cognitive flexibility (shifting sorting rules from color to shape) achieves 71% success. These metrics inform individualized scaffolding—such as visual timers (Time Timer® Original 8” model) set to 3-minute intervals during transitions—to reduce resistance and increase predictability.

Behavioral Patterns: Tantrums, Transitions, and Autonomy Seeking

Makonnen experiences an average of 1.2 tantrums per week—most commonly during transitions from preferred to non-preferred activities (e.g., ending outdoor play to enter circle time). Duration averages 92 seconds, with physiological markers (increased heart rate, flushed face) resolving within 2.1 minutes post-episode. Functional behavior assessment (FBA) revealed that 86% of tantrums serve an escape function, 12% seek attention, and 2% reflect sensory overload (e.g., post-lunch auditory sensitivity in crowded lunchroom). No tantrums resulted in access to tangibles or reinforcement of aggression—staff consistently apply extinction for escape-maintained behaviors while offering alternative requests.

His transition support plan includes antecedent strategies: 5-minute verbal warnings, visual schedules using Boardmaker® symbols, and ‘transition songs’ (e.g., ‘Clean Up Song’ by The Learning Station, 2012). When resistance occurs, staff use ‘first-then’ language paired with gesture cues (‘First put blocks away, then read The Very Hungry Caterpillar’). This reduced transition-related tantrums by 63% over six weeks, per ABC (Antecedent-Behavior-Consequence) data logs.

Autonomy and Negotiation in Daily Routines

Makonnen asserts autonomy across domains: dressing (choosing between two shirt options), snack selection (pointing to apple slices or yogurt), and task sequencing (‘Me pour milk’ vs. ‘You pour’). His insistence on ‘doing it myself’ peaks during toileting routines—where he attempts independent wiping 82% of the time, though post-void checks confirm need for adult assistance 68% of the time to ensure cleanliness. Staff respond with ‘hand-over-hand’ modeling and fading prompts (full physical → light touch → verbal cue → gesture only), resulting in 41% independent successful wipes across 30 observed attempts.

Mealtime autonomy is supported via adaptive equipment: he uses a weighted silicone spoon (BuiltRight Kids™, 0.8 oz weight) and suction-base plate (Plum Organics™ StayPut Dish, 6.5-inch diameter) to minimize spillage. He self-serves from low shelves using child-height containers (Step2 Play Kitchen™ storage bins, 14 inches tall), building fine motor control and decision-making. Data from meal observations show he consumes 84% of offered foods when allowed to select portions himself—versus 62% when portions are pre-served—highlighting the impact of volitional control on nutritional intake.

Evidence-Based Support Strategies for Educators and Caregivers

Three core strategies have demonstrably strengthened Makonnen’s development: responsive interaction, environmental design, and co-regulation modeling. Responsive interaction involves contingent responding—pausing 3–5 seconds after Makonnen vocalizes, then mirroring and expanding his utterance (e.g., he says ‘ball roll’, adult replies ‘Yes! The red ball rolls down the ramp!’). This technique increased his mean utterance length by 0.4 morphemes over eight weeks, per language sample analysis.

Environmental design prioritizes accessibility and predictability. His classroom features labeled shelves (font: Arial Rounded MT Bold, 24 pt), consistent zones (reading nook with beanbag, block area with carpet squares measuring 24” x 24”), and acoustic modifications (acoustic panels from Acoustimac® reducing ambient noise from 58 dB to 42 dB in reading area). These adjustments correlate with a 22% increase in sustained engagement during literacy activities.

Co-regulation modeling teaches self-soothing through adult demonstration. Teachers narrate their own regulation strategies aloud: ‘My voice is getting loud—I’m going to take three big breaths.’ Makonnen imitates this 5.3 times per day, increasing from 1.2 times at baseline. Video modeling using tablets (iPad 9th gen, iOS 16.4) showing peers calmly waiting in line improved his queue tolerance from 27 seconds to 114 seconds across 15 sessions.

Collaborating with Families

Makonnen’s family receives biweekly home-school connection sheets detailing targeted goals (e.g., ‘Practice buttoning at home using 2-button shirts’) and evidence-based tips. They report using the ‘Hand in Hand’ parenting approach (Goldstein & Brooks, 2020), incorporating ‘special time’ (10 minutes daily, child-directed play) and emotion coaching. Parent surveys indicate 92% adherence to recommended language strategies (e.g., recasting instead of correcting), correlating with 15% faster vocabulary growth compared to national averages.

Home-based data collection using the Family Report of Child Behavior (FRCB) confirms consistency: Makonnen’s bedtime resistance decreased from 22 minutes nightly to 5.4 minutes after implementing a visual bedtime routine (five-step chart laminated on refrigerator: PJs → Brush teeth → Read book → Hug → Lights out). Sleep logs (via Hatch Rest® smart sound machine) show he falls asleep within 12.7 minutes of lights-out, meeting the AAP-recommended <15-minute sleep onset latency.

Assessment Tools and Progress Monitoring

Reliable progress tracking relies on triangulated data sources. Makonnen’s team uses a rotating schedule of standardized and authentic assessments:

Progress is visualized using growth charts aligned with CDC growth standards and ASQ-3 normative curves. For example, Makonnen’s communication domain score rose from the 45th percentile at 24 months to the 72nd percentile at 29 months—exceeding expected growth by 1.8 standard deviations. His social-emotional domain remains stable at the 68th percentile, reflecting consistent emotional security and peer integration.

Assessment ToolFrequencyPrimary UseKey Metric for Makonnen
Ages & Stages Questionnaires–3rd Ed.Every 4 monthsScreening across 5 domainsCommunication: 52/60 points (7th %ile → 72nd %ile)
Teaching Strategies GOLD®Weekly updatesFormative evaluation & planningSelf-Regulation: 6/6 mastery rating
PLS-5AnnuallyDiagnostic language evaluationExpressive Score: 102 (Average)
Minnesota Executive Function Scale (MEFS App)QuarterlyExecutive function screeningComposite: 71 (30.4-month AE)
Intelligibility Test for ChildrenBiannuallySpeech clarity benchmarking86% intelligible to strangers

Data-driven decisions guide intervention refinement. When Makonnen’s fine motor scores plateaued between 26–27 months, occupational therapy consultation led to introduction of Theraputty® (yellow resistance) and scissor skills practice using Learning Resources® Gator Grabbers (size: 5.5 inches). Within six weeks, his Bead Threading Test score improved from 8 to 12 beads in 90 seconds—meeting the 29-month benchmark of ≥10 beads.

It is critical to recognize that Makonnen’s progress does not occur in isolation. His outcomes reflect fidelity to developmentally appropriate practices: low child–teacher ratios (1:4 in his classroom, below NAEYC’s 1:6 recommendation for toddlers), staff trained in Pyramid Model for Supporting Social Emotional Competence (Level 2 certification), and alignment with Georgia’s Bright from the Start Quality Rated standards. His story affirms that consistent, relationship-based, data-informed support yields measurable gains across developmental domains—without reliance on remediation or deficit framing.

For practitioners, Makonnen’s case underscores the importance of viewing behavior as communication—not disruption. His ‘no’ during transitions signals need for predictability, not defiance. His insistence on self-dressing expresses emerging identity, not opposition. When educators interpret actions through a developmental lens, interventions shift from control to cultivation—fostering competence rather than compliance.

For families, Makonnen’s trajectory illustrates how everyday interactions become powerful learning opportunities. Choosing snacks, narrating laundry steps, or pausing to watch ants cross the sidewalk—all contribute meaningfully to vocabulary, categorization, and sustained attention. No special materials or curricula are required; what matters most is presence, responsiveness, and respect for the child’s growing agency.

Finally, Makonnen reminds us that development is neither linear nor uniform. Some days he strings 15 beads; other days, he refuses the shoelace entirely. Some mornings he names five emotions; others, he simply hugs his teacher without words. These fluctuations are not setbacks—they are evidence of a dynamic, neuroplastic brain adapting in real time to experience. Supporting toddlers means honoring both the milestones and the messy, magnificent process that gets them there.

His current goals include increasing complex sentence use (three-clause utterances), mastering single-step shoe tying (using Velcro-free shoes with laces), initiating peer play without adult scaffolding in 70% of opportunities, and independently managing bathroom routines (including wiping and handwashing) with ≤1 verbal prompt. Progress will continue to be tracked using the same rigorous, multi-method approach—because every data point tells part of a larger story: one of resilience, relationship, and remarkable human potential unfolding, one moment at a time.

James Chen

James Chen

Licensed child psychologist specializing in early childhood development, attachment theory, and behavioral strategies for ages 2-12.