For my Rube Goldberg project, the materials my group needed were kind of weird but they worked out pretty well. The materials were pulley wheels, string/yarn, tape, glue, spring, cardboard, a ramp (we used cardboard and a baby drawing table and folded it over to make it a ramp), a car that springs forward when you pull it back, a door wedge, another toy car (this time it does nothing), dowel, weights (a lot of them), plastic or paper cups, a kind of flattened wood plank, a long wood plank that can stand up on its own, books, a ball, and a laptop! Those were the materials for my Rube Goldberg project.