Why do elephants have trunks? Why are clouds different shapes? Why does popcorn pop? Why does my tummy rumble? Why do we flush the toilet? This magnificent book features chapters on Bugs, Pets, Wild Animals, the Body, Food, Machines and Space and also includes some of the mysteries which experts are still trying to solve! By encouraging children to question how the world works, Britannica First Big Book of Why supports STEAM learning and nurtures enquiring minds. With stunning photography and gorgeous original illustrations by Kate Slater, this is the ultimate gift for kids who need to know WHY.