This science experiment is interesting because it defies gravity. First get a funnel and a ping-pong ball. Then set the ball in the wide end of the funnel. Using either an air compressor or your lungs, blow through the narrow end of funnel.
When air rushes around the ball, it creates a vacuum. This pulls the ball toward you. If you use the air compressor, the funnel can be completely upside down, and the ball will not come out.
