Ben and Nathan made their cars with my help, its was Nathan's first Derby and Ben's 3rd. Nathan got 13th out of 27 and Ben 15th both got 5th in the den's out of 9/10 kids. So a respectable average score. More importantly they had a lot of fun. We had one issue with Ben's car since the glue that was holding Ben's metal exasts on came off (stupid hot glue gun) so we got duct tape for a quick fix.