This weekend we did something really cool. We designed bridges made completely out of paper. Daddy set up 2 Lego stanchions 15" apart and announced that the job was to build a bridge to connect them. We engineers tubes out of paper to form support columns, the underbed for the road, and cross-braces. We then kept adding cars to see how many toy cars the bridge could hold before it collapsed. In the first round, Daddy's bridge won. But in round 2, my bridge won. At the time Daddy's collapsed, it was holding about 4 pounds of cars on the roadbed.