Students are learning about force, motion, and simple machines in science class. Have small groups of students create a Rube Goldberg machine and then connect it with another group, etc. until the whole class has created one large Rube Goldberg machine. Then, you could have other classes in your grade level and other grade levels create one and connect them. Soon, you would have one large Rube Goldberg machine throughout the entire campus that everyone has helped create!