His sons' band inspired this one.
It takes a strong wind to get this one going.

Carol is his daughter's name.

This is one of his grandaughters.
Listen to one of her first words.

Mike shows Vollis' family how he animated a photograph of one of the whirligigs.
Here's what they saw.

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From Windmills to Whirligigs / Meet Vollis / ©Science Museum of Minnesota 1996