The goal of a Rube Goldberg machine is to connect as many different items as possible to demonstrate how energy can be transferred from one to the next. For example, a domino course could end by hitting a golf ball, the golf ball would roll down a small ramp and hit the back of a wooden train, the train would roll down the track until it hit the launch button on a Hot Wheels track, and so on.

With so many moving parts, there’s a lot that can cause frustration - take your time and expect that you’ll need to change your design to get it to work perfectly.