Constructing Rube Goldberg Machine?

Question

I have to make a rube goldberg machine for my physics project but i have no clue on how to do it. Does anyone know where i might find steps/method to make a 20 step rube goldberg machine.

I was planning on making either a fish feeder or a photo snapper but any other suggestinons will also be great.

Answer 1

http://www.youtube.com/watch?v=1kvdq8cRN...