For our Rube Goldberg, we will start by launching a catapult, which hits a book on a zip line, which hits a car that rolls down a ramp, that hits a wheel. The wheel goes down a small , which hits a marble that goes down a paper towel tube. The marble hits a ball of string. The string unrolls, and hits a row of dominoes. The dominoes hit a Hello Kitty action figure which hits a confetti popper.