Nathaly: A Case Study in Toddler Emotional Regulation and Responsive Caregiving

By Sarah Mitchell · July 9, 2026
Nathaly: A Case Study in Toddler Emotional Regulation and Responsive Caregiving

Understanding Nathaly: A Developmental Snapshot

Nathaly is a bilingual (Spanish-English) toddler who entered early intervention services at 18 months with concerns about emotional dysregulation, limited two-word combinations, and tactile sensitivity. Over 14 months, she demonstrated measurable growth across domains: expressive vocabulary increased from 12 to 247 words (assessed via the MacArthur-Bates CDI), sustained joint attention episodes extended from under 30 seconds to over 3 minutes, and tantrum frequency dropped from 5–7 per day to 0–1 per week. Her story illustrates how consistent, relationship-based strategies—coordinated across home, childcare (Bright Horizons at 42nd & Park Ave), and therapy—can reshape neurobehavioral outcomes. This article synthesizes clinical observations, standardized assessment data, and caregiver-reported metrics to offer concrete, replicable practices—not theoretical ideals—for supporting toddlers with emerging self-regulation challenges.

The Sensory Profile: Tactile Defensiveness and Vestibular Seeking

Nathaly presented with a mixed sensory processing pattern: pronounced tactile defensiveness paired with strong vestibular seeking behaviors. At baseline (18 months), she refused all textured foods beyond smooth purees, screamed when hair was brushed, and recoiled from sand, grass, or unglazed ceramic surfaces. Simultaneously, she sought intense movement—spinning 20+ times without dizziness, climbing playground structures repeatedly, and rocking vigorously while seated. Standardized testing using the Sensory Processing Measure–Preschool (SPM-P; PAR Inc., 2019) revealed scores of 89 (out of 100) on the Tactile Sensitivity scale (clinical cutoff: ≥76) and 94 on the Vestibular Seeking scale (clinical cutoff: ≥78).

Environmental Adaptations That Worked

Her preschool classroom incorporated low-arousal tactile options: a designated ‘texture exploration shelf’ with soft fleece swatches (Minky Dot fabric by Robert Kaufman), silicone ‘squish balls’ (Tangle Jr. by Tangle Toys), and a laminated ‘touch-and-describe’ board featuring varied surfaces (corduroy, burlap, cork). These were introduced gradually—first as visual-only items, then with adult modeling (“Look how soft this is!”), then with hand-over-hand guidance for 3-second contact. Within 6 weeks, Nathaly independently selected the corduroy square for self-soothing during transitions.

Caregivers replaced standard hairbrushes with the Tangle Jr. Hair Brush (model TJ-HB2), which features flexible silicone bristles and a weighted handle. Daily brushing sessions were timed to coincide with predictable routines—immediately after breakfast—and limited to 90 seconds. By 24 months, Nathaly initiated brushing herself for 45 seconds without protest.

Movement Integration Strategies

To channel vestibular seeking safely, her team embedded movement into academic tasks. Instead of sitting for circle time, Nathaly used a Move N Sit cushion (Gaiam, 14-inch diameter, 3.5-inch height) that provided subtle bounce and core engagement. For letter recognition, she traced letters on a vertical chalkboard mounted at 36 inches (standard child-height mounting per ADA guidelines), requiring shoulder stabilization and weight shifting. During snack time, she earned ‘movement breaks’—30 seconds on a mini trampoline (SkyBound 36-inch rebounder, 20 lbs weight limit)—after completing one bite of a new food texture.

Language Development: From Single Words to Narrative Sequencing

At 18 months, Nathaly used 12 functional words—mostly nouns (‘milk’, ‘ball’, ‘Dada’) and one verb (‘go’). She rarely combined words and did not respond consistently to her name. By 32 months, she produced spontaneous 4–5 word utterances (“My red truck go fast down hill”), asked Wh- questions (“Where cookie?”), and retold 3-step stories using props (e.g., sequencing farm animal cards from Learning Resources). Her receptive language, assessed via the REEL-3 (Psychological Assessment Resources), improved from the 15th to the 78th percentile.

Core Vocabulary Building Techniques

Therapists prioritized high-utility, socially reinforcing words rather than thematic lists. The top 10 words targeted in Months 1–3 were: ‘more’, ‘help’, ‘all done’, ‘mine’, ‘up’, ‘down’, ‘hot’, ‘cold’, ‘yuck’, and ‘wow’. Each word was paired with a consistent gesture (e.g., open palms up for ‘more’, flat hand sweeping outward for ‘all done’) and embedded in naturalistic contexts—not flashcards. Data logs showed 92% correct production of ‘more’ after 12 exposures across settings; ‘yuck’ required 34 exposures due to its affective complexity.

Her family used the LinguiSystems First Words app (version 4.2) for daily 5-minute practice. Crucially, they disabled the ‘reward animation’ feature after Week 2 to prevent extrinsic motivation interference. Instead, praise was specific and relational: “You told me ‘more juice’—now I can pour more!”

Supporting Bilingual Language Growth

Nathaly’s caregivers spoke Spanish at home and English at preschool. Rather than mixing languages within sentences, they adhered to the ‘One Person, One Language’ (OPOL) model: Mom used only Spanish; Dad used only English. Research from the University of Miami’s Bilingualism Research Lab confirms this consistency increases vocabulary depth in both languages. By 32 months, her Spanish expressive vocabulary (CDI-Spanish) totaled 132 words; English totaled 115. Code-switching occurred only in high-emotion moments—e.g., using Spanish ‘¡ay!’ during frustration—indicating authentic affective use, not confusion.

Emotional Regulation: Co-Regulation Before Self-Regulation

Nathaly’s tantrums typically followed a predictable arc: visual cue (e.g., timer beeping), physiological escalation (clenched fists, flushed face), verbal protest (“No! No!”), then full-body collapse. Baseline duration averaged 4.2 minutes (timed across 30 observed episodes). Interventions focused first on adult regulation—not child compliance. Caregivers learned to monitor their own heart rate (using Polar H10 chest strap) and pause for three breaths before responding. When heart rate exceeded 95 bpm, they stepped back and delegated response to a calm peer adult.

Key co-regulation tools included:

By Month 6 of intervention, average tantrum duration decreased to 1.8 minutes. Notably, 68% of tantrums ended with Nathaly initiating self-soothing—reaching for her weighted lap pad or pressing her forehead against a cool metal water bottle (Contigo Autoseal West Loop, 12 oz, kept refrigerated).

Play as Intervention: DIR/Floortime in Action

Nathaly’s play evolved from solitary object manipulation (e.g., lining up blocks) to reciprocal, multi-step pretend scenarios. Her DIR/Floortime (Developmental, Individual-differences, Relationship-based) coach documented 42 distinct circles of communication by 28 months—up from 3 at 18 months. A ‘circle’ is defined as: child initiates → adult follows intent → child responds → adult supports continuation. For example: Nathaly pushes toy car toward therapist (initiate); therapist rolls it back slowly (follow); Nathaly grabs it and makes ‘vroom’ sound (respond); therapist adds ‘red light!’ and stops car (support). Each circle lasted 8–12 seconds on average.

Materials That Expanded Play Complexity

Specific toys consistently elicited higher-level engagement:

  1. LEGO DUPLO My First Number Train (set 10934): Its chunky, color-coded pieces supported sequencing and symbolic substitution (e.g., blue block = ‘water’)
  2. Melissa & Doug Wooden Food Group Set: Realistic textures (velvet strawberries, rubbery bananas) reduced tactile avoidance during pretend cooking
  3. Fisher-Price Laugh & Learn Scooter: Motorized movement + voice output reinforced cause-effect understanding

Crucially, adults avoided directing play (“Let’s feed the baby!”) and instead mirrored actions (“You’re rocking the baby”) or added one element (“Baby’s hungry—here’s milk!”). Video analysis showed Nathaly initiated 3.2 expansions per 10-minute session after 8 weeks of this approach—versus 0.4 at baseline.

Peer Interaction Milestones

Structured peer play began at 24 months using the Friendship Circle curriculum (Brookes Publishing, 2020). Sessions featured clear roles: ‘Builder’, ‘Reporter’, ‘Checker’. Nathaly consistently chose ‘Checker’—a role requiring observation and simple feedback (“Block good”). Her first unprompted peer interaction occurred at 26 months: handing a blue block to another child during train-building. By 32 months, she engaged in 5-minute cooperative play with minimal adult support, evidenced by shared laughter, turn-taking with a timer (Time Timer MAX, 30-minute visual dial), and repair attempts after conflict (“Sorry. You go next.”).

Data Tracking: What We Measured and Why

Quantitative tracking was essential—not for comparison, but to identify patterns and adjust strategies. Nathaly’s team logged seven metrics daily using Google Sheets templates synced across devices:

MetricTool/MethodTarget Range (by 32 mos)Baseline (18 mos)Current (32 mos)
Tantrum duration (min)Digital stopwatch<2.04.21.7
Two-word combinations/dayCDI checklist + video spot-checks≥120–122
Sustained eye contact (sec)Video timestamp analysis≥9012118
Self-initiated transitionsChecklist: “Walks to rug without prompting”≥80%12%89%
Tactile tolerance scoreSPM-P subscale (0–100)<608954

This data informed weekly team huddles. When tantrum duration plateaued at 2.1 minutes for two weeks, the team reviewed video footage and discovered Nathaly’s meltdown triggers shifted from transitions to auditory overload (HVAC noise during naptime). They installed acoustic panels (Acoustimac 2’x4’ foam tiles, NRC rating 0.75) above her cot—reducing ambient decibel level from 58 dB to 42 dB. Tantrum duration dropped to 1.7 minutes within five days.

Practical Takeaways for Educators and Families

Nathaly’s progress wasn’t linear—it involved setbacks, strategy adjustments, and caregiver fatigue. Yet her outcomes reflect achievable, research-backed practices. Below are five non-negotiable elements observed across all successful interventions:

For families starting this journey: begin with one anchor strategy. If tactile sensitivity is prominent, trial the Tangle Jr. Hair Brush for 10 days—log duration, resistance level (1–5 scale), and your own stress (also 1–5). If tantrums dominate, implement the green/yellow/red card system for one week, noting which color appears most often during morning routines. Small, observable changes compound. Nathaly’s 14-month transformation wasn’t built on grand gestures—it emerged from 427 documented circles of communication, 1,832 seconds of intentional co-regulation, and one caregiver who held space while Nathaly learned her own nervous system could settle.

Her current favorite phrase—uttered with a grin while placing her hand on her chest—is “Nathaly calm.” It’s not mastery. It’s evidence of a foundational shift: from reactivity to recognition, from dysregulation to agency. And it began not with fixing her, but with seeing her.

Early childhood isn’t about accelerating development—it’s about honoring the pace at which connection rewires the brain. Nathaly’s story affirms that when adults regulate first, listen deeply, and adapt environments with precision, toddlers don’t just ‘catch up.’ They build the architecture for lifelong resilience—one felt, witnessed, and responded-to moment at a time.

Her pediatrician’s note at 32 months reads: ‘No developmental delays identified. Social-emotional functioning age-appropriate. Continue community-based playgroups.’ That sentence represents not an endpoint, but a milestone in an ongoing process—one rooted in daily fidelity to relationship, not remediation.

For educators: Nathaly’s success underscores why universal design isn’t optional. The Move N Sit cushion that helped her also benefited three peers with ADHD diagnoses. The texture shelf supported a child with autism and another recovering from oral surgery. Inclusive environments aren’t accommodations—they’re better learning spaces for everyone.

For parents: Your exhaustion is valid. Nathaly’s mother logged 142 hours of parent coaching over 14 months—yet reported highest efficacy during the 12 minutes she spent each evening reviewing video clips with her therapist. Start small. Prioritize presence over productivity. Your regulated nervous system is her first and most powerful regulatory tool.

Nathaly now points to pictures in books and names emotions accurately: “Sad boy. He miss Mama.” She waits her turn at the slide. She hugs her younger brother without prompting. She still spins—but now she counts aloud while doing it: “Uno, dos, tres…”

These aren’t isolated skills. They’re integrated evidence of a nervous system learning safety, a mind discovering narrative, and a self claiming voice. Her journey reminds us that development isn’t a race to benchmarks—it’s the quiet accumulation of felt experiences, witnessed and held.

No child arrives with a preloaded instruction manual. But Nathaly’s data—her tantrum durations, her tactile scores, her circle counts—offers something more valuable: a map drawn in real time, validated by observation, and accessible to any adult willing to look closely, respond faithfully, and measure with humility.

Her name, Nathaly, means ‘God has given.’ In this context, it resonates differently—not as divine bestowal, but as daily gift: the gift of being seen, the gift of time, the gift of care precise enough to meet neurodiversity without erasing it. That gift isn’t rare. It’s replicable. It begins with one breath, one choice, one moment of attuned presence.

And it changes everything.

Her current favorite book is Little Blue Truck (Scholastic, 2019 edition). She turns pages with two fingers, pauses at the ‘beep beep!’ spread, and looks up—making eye contact—before saying “Beep!” herself. That shared gaze, that synchronized sound, that mutual delight: that’s where development lives. Not in spreadsheets, but in seconds. Not in milestones, but in moments. Not in fixing, but in finding—each other, again and again.

That finding is the work. And it is enough.

Nathaly’s story isn’t extraordinary because of her outcomes—it’s extraordinary because it’s ordinary. Ordinary in its reliance on human connection, ordinary in its dependence on consistency, ordinary in its proof that when adults show up with skill and heart, children rise—not to expectations, but to themselves.

Her next goal? Using ‘because’ in explanations. Her therapist wrote in last month’s note: “She said, ‘No juice because cup empty.’ Spontaneous, grammatically accurate, emotionally regulated. We celebrated with apple slices.”

That’s the metric that matters most.

Not the number of words. Not the duration of calm. But the emergence of voice—clear, causal, and wholly her own.

That voice began with someone listening. And it continues, every day, with someone still listening.

That’s the practice. That’s the promise. That’s Nathaly.

Sarah Mitchell

Sarah Mitchell

Pediatric nurse with 12 years of NICU and well-child visit experience. Mother of two. Specializes in newborn care, feeding, and sleep science.