We've all seen the instruments made of glasses with different amounts of water, but the other day I figured out how to combine the cups into one. We all know that the more water you have in the cup, the lower the note is.
Step 1: Materials
A glass jar*
*Has to fit inside of the glass
Step 2: What You Do
Step 3: How It Works
Also experimenting with this I figured out how to make air float!
This is a simple illusion. All you have to do is wedge the jar on the bottom of the glass and it will usually stick there.