Elmer's White Glue. The craft sticks can be cut, formed, or shaped. The glue is not to be used as reinforcement. The bridge must be wide enough to push a Matchbox car through. The bridge must be a minimum of 3 inches in the center.
Paint is optional.
This is a picture of my bridge seconds before the press was turned on. I had worked so hard on my bridge, it was going to be sad to see it crushed. After all, there had only been rumors of a person who had maxed out the machine before. I couldn't believe that my design held so much weight. I was pleasantly surprised that I surpassed my goal.