The other night Hayden was playing with the marble track and asked if I wanted to help build it. We were having fun as the marble track got to be about Hayden’t height. Since there were more pieces left in the bucket, obviously we had to build the tower bigger. As it grew, the stability of the tower decreased so we had a couple of mishaps. After about 3 or 4 versions, we got a tower that stood up under its own weight while being taller than Hayden. He had to grab a chair from the kitchen to put the marbles in. This is a video of the final product.