The floating ping pong ball

What you will need:

1. Hair dryer
2. ping pong ball

How to do it:

1. Sit the ping pong ball on the hair dryer
2. Turn on the hair dryer
3. Now observe what is happening

What happened was the ping pong ball just sat floating over top of the hair dryer.  The reason why it worked and the ping pong ball just sat floating over top of the hair dryer is because the air around the outside of the ping pong ball is forcing the ping pong ball to stay over the top of the hair dryer.  The ping pong ball doesn't go straight up into the air because the gravity is pulling the ping pong ball down.