>All you need for this one is a paper bag (like a lunch bag) and some air in your lungs. Open the paper bag and scrunch the top of the paper bag so you can blow into it. Blow the bag up so it is tight, holding the top of the bag closed. Now bang the bottom of the bag hard enough to break it. It should make a loud ‘bang’.
Ooo! You scared me!
This activity promotes learning about cause and effect.