Whats the most fun about the Shake 'n(tm) Go Speedway, the racing or the crashing? Both! Cars racing through the intersections, engines revving, and SMASH! Same Shake n Go technology where you shake up the cars, set em down and watch em race. But on this toy race track, now theres the added excitement of the crash-upshoods popping open, pieces flying offits so cool! Two Crash-Ups Racers included with the 4.5-foot long Shake n Go! Crash-Ups Speedway. Race any Shake n Go cars on the Crash-Ups Speedway! No batteries required for toy race track.