Everything you can touch and hold is made up of matter - including you, your dog, and this book! Matter is stuff that you can weigh and that takes up space, which means pretty much everything in the world is made of matter!
You can find waves just about everywhere you look! Take a tour of the world of waves in this fun, illustrated introduction to the concept of waves and energy.--
When you feel like running, leaping, and singing, people might say you have a lot of energy. And you're not the only one! Energy is the stuff that makes everything live and move. People, animals, plants - we all need energy to live!