levitating ball
I'm sure Jim Henson was trying this when he invented Kermit the frog.

gotta have this:
 ping pong ball
hair dryer

(1) it floats in the air!
Turn on the hair dryer and put the ball in the hot air blast. It's that easy.

(2) how low can you go?
see how far you can tip the dryer before the ball falls. You can also do a similar trick with an adjustable fan and a beach ball.

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