'What Were You Thinking!?' by Nathan Wallis is a Family & Health Paperback Book. '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 behaviour makes sense once you understand what's happening upstairs. Writing in plain English with warmth and humour, and sharing plenty of lightbulb moments, Wallis distils complex neuroscience into practical insights that 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.