Hey! Here’s an update on the growing dominoes. A chain of dominos of increasing size is used to drive the catapult that tosses the first ball for the marble run up to a platform. As you can see the large Domino is mounted on a joint to hit the catapult in a controlled manner. With the prototype there was one issue. It was hard to set up the Dominos to actually knock over each other. To solve this problem a little ground plate with flat tiles and plates with studs is used to guide the domino set up.