2–3 years.
“Vocabulary triples between two and three. So does opinion strength. The year your child becomes a negotiator — and you become a translator.”
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The research swims past.
Reach in and pull out a question. The full archive is below.

When to Drop a Nap: What the Charts Don't Tell You
Every chart gives you age ranges. What none of them explain is why those ranges exist — and why two toddlers the same age can have completely different transitions. Here's what the neuroscience says, including what happens to night sleep and whether quiet time does anything.

How to Discipline a Toddler Without Yelling: The Neuroscience Behind What Works
When a two-year-old is face-down on the grocery store floor screaming about the wrong yogurt pouch, "just say no" isn't failing because you're doing it wrong — it's failing because the part of the brain that could make "stop" happen is still being built. Here's what the neuroscience of toddler discipline actually looks like, and which techniques work because of that biology, not despite it.

Toddler Meal Ideas: What Research Says About What Goes on the Plate
Most toddler meal articles hand you a list of fifty recipes and send you on your way. This one starts somewhere different: with the research finding that what goes on the plate is only part of what determines whether a meal goes smoothly. Evidence-based meal ideas for fussy eaters ages 1–3, organized by the nutritional priorities that actually matter at this age (iron, zinc, and dietary variety) plus the mealtime structure that research links to less refusal.

Gentle Parenting: What the Research Says
Everyone cites the same study as proof gentle parenting works — or doesn't. The problem: that study never looked at a single child. Here's what the research shows, which behaviors have 40 years of evidence behind them, and the one condition that decides whether any of it works.

Summer Activities for Toddlers: What the Research Says About Outdoor Play
Most summer activity lists for toddlers are just numbered ideas with no explanation of why any of them matter. This one starts somewhere different: a 2023 JAMA Pediatrics study that found outdoor play measurably offsets developmental costs of screen time, a heat-safety threshold most parents haven't heard of, and a breakdown of what activities actually fit a 12-month-old versus a 3-year-old — because developmentally, those are very different kids.

Late Talker: When to Worry About Speech Delay
Your toddler understands everything but barely talks. Is this normal development or a warning sign? Learn when late talking resolves on its own and when it signals a deeper delay—backed by 17-year research tracking children from age 2 to adulthood.
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