I put another lesson on my site today - probably the last one for the year. It is similiar to the thermotrope (sp?) lesson, only this one lies flat. It's at http://www.geocities.com/theartkids/artlessons/third/spinner.html . I tried several times to get a picture of the stupid thing spinning, but my camera would show a still shot, so I gave up! :-) I'll replace the picture next year with a student example, but all those projects have gone home already.
K-12 Kansas Art Teacher