Knowing WHY Changed Everything

The Long-Awaited Owner's Manual for Ages 0-12

By: David A. Smith

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Paperback | 19 May 2026

At a Glance

Paperback
264 Pages

Dimensions(cm)
22.86 x 15.24 x 1.4

Paperback

$30.79

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You've been handed a small, baffling, beautiful human - and no instructions.

That changes now.

Knowing WHY Changed Everything is the owner's manual parents have always needed but never had. From the first wordless weeks of infancy through the complex world of the preteen years, this book translates what's actually happening inside your child's developing brain, what they need from you - and what that means for how you connect, communicate, and yes, survive until bedtime.

You'll discover why the toddler who "defies" you often simply can't process what you're asking. Why the five-year-old who "should know better" is running on architecture that isn't built for that yet. Why the ten-year-old who "doesn't care" is navigating an interior world you can no longer fully see.

This isn't excuse-making. It's science. And understanding it changes everything.

Inside: â¢ a developmental field guide for each stage â¢ the research behind every claim â¢ what it looks like when it's working â¢ and how to repair when it doesn't.

When you understand what's actually happening inside your child - the science, the stages, the beautiful chaos of a brain under construction - the hard moments stop feeling like failure. They start feeling like something you can work with.

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