For second graders, air is a tricky science concept. After all, kids this age think in very concrete terms. And air is anything but concrete! It’s invisible; it doesn’t make sounds; you can’t pick it up and throw it. So how do we know it exists?
One key way: we can see what it does. Here is an experiment that uses simple household materials to prove the point. It can also make for a very amusing family “magic” show. Just watch!