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From tummy time to snack time: when big siblings feed the caterpillar
The caterpillar that keeps a baby company during tummy time also loves leaves. Which means the big sibling finally has…
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A period tracker that doesn’t need your email
No account, no email, no ads — and your cycle data never leaves your phone. Here’s how our period tracker…
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Can’t read yet? Why every animal name in LAFC is spoken aloud
Toddlers pick up words by hearing them over and over. So in LAFC, every animal name is spoken aloud —…
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Why black and white? High-contrast visuals for newborn eyes
Newborns see the world in soft focus, and bold black-and-white shapes stand out. That’s why our caterpillar skipped the rainbow.
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Meet Lara’s Animal Flashcards: made with my daughter
LAFC is named after my daughter Lara. It’s a calm animal-names game where every name is spoken aloud, so little…
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Tummy time without the rattle solo
You on the floor, waving a rattle, doing voices. The baby looks at the wall. Here’s what made tummy time…
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Tummy Time origin story – made for my Lara
When my daughter was a baby, we were told what every parent is told: do lots of tummy time. She…
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Tummy Time app is now free
Updated October 2026: this post replaces our older “completely free” announcement. Tummy Time is free to download on iPhone and…
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Trailer for our Tummy Time Exercise app
We made a cute trailer for our free Tummy Time exercise app to inspire you to do regular tummy time…
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Baby Proof your iPad and iPhone
This tip can change your life, specially if you are using an iOS app to help your child’s development (like…
Newborns & Infants
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2-Month-Old Baby Developmental Milestones: Complete Checklist & Guide
The first eight weeks with a newborn feel like a whirlwind of feeding, soothing, and adjusting to a brand-new rhythm…
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2 to 4-Month-Old Baby Developmental Milestones: Complete Guide & Checklist
Between 2 and 4 months of age, your baby undergoes an enchanting transformation. The quiet, reflexive newborn of the early…
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4 to 6-Month-Old Baby Developmental Milestones: Complete Guide & Checklist
The transition from 4 to 6 months represents a milestone explosion in your baby’s first year. Suddenly, your baby is…
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6 to 9-Month-Old Baby Developmental Milestones: Complete Guide & Checklist
Between 6 and 9 months of age, your baby undergoes a profound leap in autonomy and mobility. The world is…
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9 to 12-Month-Old Baby Developmental Milestones: Complete Guide & Checklist
The final stretch of your baby’s first year is a whirlwind of cognitive triumphs and motor firsts. Between 9 and…
Toddlers
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12 to 15-Month-Old Toddler Developmental Milestones: Complete Guide & Checklist
Entering toddlerhood between 12 and 15 months brings thrilling autonomy. Your child is shedding infant reliance, taking confident independent steps…
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15 to 18-Month-Old Toddler Developmental Milestones: Complete Guide & Checklist
Between 15 and 18 months, toddlers become dynamic, opinionated little explorers. They are running across the grass, climbing onto low…
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18 to 24-Month-Old Toddler Developmental Milestones: Complete Guide & Checklist
Approaching their second birthday, toddlers experience a monumental leap in language and conceptual reasoning. Between 18 and 24 months, single…
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2 to 2.5-Year-Old (30 Months) Toddler Developmental Milestones: Complete Guide
Between 24 and 30 months (2 to 2.5 years), toddlers undergo tremendous refinement in expressive communication and fine motor precision.…
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2.5 to 3-Year-Old (36 Months) Child Developmental Milestones: Complete Guide
Reaching age 3 marks the proud threshold between toddlerhood and early preschool. Three-year-olds are lively conversationalists who ask endless ‘Why?’…
Preschoolers
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3 to 4-Year-Old Child Developmental Milestones: Complete Guide & Checklist
Between 3 and 4 years of age, children transition fully into the imaginative world of preschool. Their cognitive and verbal faculties are operating at high gear: they recite nursery rhymes from memory, negotiate elaborate pretend play roles with friends, draw people with distinct body parts, and demonstrate remarkable balance and agility. Grounded in clinical developmental…
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4 to 5-Year-Old Preschooler Developmental Milestones: Complete Kindergarten Readiness Guide
Between 4 and 5 years of age, your child stands on the threshold of kindergarten. This final preschool year brings remarkable refinement across every developmental pillar: complex narrative storytelling, foundational numeracy, drawing people with detailed anatomy, high physical agility, and deep social cooperation. Grounded in clinical developmental surveillance guidelines published by the American Academy of…



