If you want to try making your own whirligig, Vollis suggests starting with a bicycle wheel.
Watch the movie (1.6mb)
01 - sln.org one
02 - blue cone
03 - ice cream cone
04 - atlanta pieces
05 - welding natalie's base
 06 - backwards clock
07 - big red one
08 - the tree
09 - did ya' know?
10 - hamilton beach
 11 - lots of cups
12 - the mules
13 - karen's favorite
14 - keep on spinnin'
15 - the grandkids

From Windmills to Whirligigs / ©Science Museum of Minnesota 1996