Coanda (Bernoulli) blower
The classic blower which makes a ball float stably in the air almost as if by magic.
A beach ball will float in the air stream coming out of the blower.
You can turn the blower on, and change the speed of the air.
The nozzle can be rotated to experiment with how this affects it. It also looks a lot more impressive if the nozzle is tipped over by 45 degrees.
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