Even young children can understand the science behind the five senses, thanks to these simple explanations and safe experiments. Do people with big ears hear better than people with small ones? Test it out by making paper "ear trumpets" that amplify sound. Or, using everyday items, create an optical device that magnifies objects. Kids will learn what makes things feel hot and cold, how scratch and sniff cards work, why salt is salty and sugar sweet, and how all the senses work together.