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"What Were You Thinking!?": Understanding your child's changing brain from birth to adulthood

Everything parents need to know about their baby, child or teen's developing brain to raise resilient, emotional intelligent kids, by globally renowned neuroscience educator, Nathan Wallis.

'What were you thinking!?'

If you've ever asked this in despair while watching a toddler melt down, a tween push boundaries, or a teenager make a truly terrible decision, this book is for you.

In 'What Were You Thinking!?': Understanding your child's changing brain from birth to adulthood, renowned neuroscience educator Nathan Wallis unpacks how the human brain develops — from newborn to adult — and why their behaviour makes sense once you understand what's happening upstairs. Written in plain English with warmth, humour, and with plenty of lightbulb moments, Wallis distils complex neuroscience into practical insights any parent, teacher, or caregiver will find invaluable.

You'll discover how the four key parts of the brain develop at different stages, why the teenage brain is effectively "closed for renovations" for several years, and what this means for discipline, learning, emotions, and decision-making. Along the way, Wallis explores brain plasticity, how to strengthen it, and even how damaged brains can heal — offering hope not just for children, but for adults too.

Drawing on decades of experience as a father, foster parent, child counsellor, lecturer, and sought-after international speaker, Nathan Wallis brings science to life in a way that's engaging, entertaining, and genuinely life changing.

271 pages, Kindle Edition

Published June 30, 2026

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Nathan Wallis

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