"Nitro Joe" is always a hit at the library, and this year was no exception. Using homemade devices, Joe gave lessons in air to a packed library.

Pictures by Mike Fak

A plunger creates a vacuum on Joe's head.

When asked who wants to get blown up, they all volunteered.

A tug of war to show how strong a vacuum is.

A small fry checks to make sure he can volunteer.

Bernoulli's principle was used to make

toilet paper fly through the room.

A young man gets to sit on the homemade hovercraft.

This young lady got to stand as she was lifted off the ground.

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