Shake and Go CARS Racers put the control of speed and power into kids' hands. Kids can act out their favourite scenes from the movie "CARS" with the four collectible vehicles in this assortment: Doc, Mater, King and McQueen. Collect them all. All cars have their own specific engine sounds and phrases that are activated when you shake them. Shake them to rev them up; then watch them go. The more you shake, the faster they go! Mater measures 15cm long.