Real Fun. Real Fast. Got a need for speed? Race again and again. Just flip the car, insert a new engine and connect the starter leads. make sure the race case ends are weighted down and the track straight. Press the button and watch it go! 4 AA’s, A10-PT Engine, starters, and plugs also needed. Ages 12+ Race Ready in 15 minutes! Scale speed up to 804kmph (500mph)