http://netapps.marshall.edu/lego/lessonplans/Merry/MerryGoRound.html
The worm gear meshing with a gear at right angles can slow the speed by 40, 24, or 8 times.
To get the Flower Merry go rounds at SENSORSCITY for May
2012
to be slow enough in front of the camera to not look like a blur
we had to gear them down.
