Each WTW kinetic sculpture goes through an idea development and trial and error process to get to the final product. This is how new mechanisms are created, run-time is lengthened, and many other pieces are refined.
Four students at the Utrecht School of Art and Technology created the following cardboard mechanism. It took a lot of trial and error to get there. Go here to view the various prototype stages to get to the final.
Cardboard Mechanics Installation from Sasj on Vimeo via Dug North.