What if your child's most frustrating behaviors were actually predictable signs of brain development?You've asked the questions in the heat of the moment: Why won't they listen? Why are they having a tantrum over the wrong-colored cup? Why do they lie when the truth is so obvious? You've wondered if you're doing something wrong.This book provides the definitive answer. Dr. Kadir Sümerkent, a medical doctor, neuroscientist, and AI architect, takes you on a clinical yet user-friendly tour of your child's developing brain. By revealing the hidden neurobiology behind 50 of the most confusing childhood behaviors, *Why They Do That* gives you the blueprint to trade frustration for empathy, and anxiety for confident, effective, brain-aligned strategies.INSIDE YOU WILL DISCOVER: The neurobiology of the toddler tantrum and why impulse control is a neurological impossibility.The real reason children lie, tattle and struggle with sharing.The link between procrastination, video games, and your child's dopamine system.How sleep, nutrition, and nature are powerful tools for building a resilient brain.