Mouse Trap Reflection Construction How it was made: The car was made by cutting out cardboard for the body that would fit the mouse trap on top of it. The wheels were made out of cardboard, larger in the back and smaller in the front. Dowel rods were used as the axels and cut the straw in half to make it so the axel would be able to spin. Changes: One change that was made was to make the body longer. This change was made so a lever could be used on the mouse trap and be able to get the wheels to move. The results of the change were that the mouse trap and lever would be able to move the wheels.