After I finished building my Rube Goldberg design, I tested it. At the end, my project had twelve steps, eight varied, and I built one step at a time. When I tested it, it would not work to the end because of the catapult part. I started fixing my parts that weren’t attached and had to add steps to my original nine steps. After that I added some dominoes so that it would hit the yo-yo instead of using a marble without the dominoes which barely moved the yo-yo.

On the next step I used the yo-yo to fall onto a tennis ball which rolled into another set of dominoes. The tennis ball kept going, then hit a car, which hit some more dominoes. Then it hit a marble which went into the brown tube that rolled down, and the marble came out and hit some more dominoes. This marble hit another set of dominoes with popsicle sticks on them which would go all the way to one, single domino that was attached to a popsicle stick.This popsicle stick had a rope attached to it, and it would fall back with the domino pulling a group of popsicle sticks taped together. When these popsicle sticks fall down, it allows a ball to go into a box – which is the goal of my project.