FLOATING BALL

You will need:
A straw
A ping-pong ball, or small styrofoam ball from a craft store

Procedure:
Take the straw, hold it in your mouth, and point it straight up.
Blow pretty hard through the straw to make a good air stream.
Set the ball gently in the air stream. The ball should float in the stream!
Make sure you do not chase the ball, and just let it float in the steady stream.
It takes practice, but it won’t go anywhere if you keep it pointed up in one place!