Kinetic Sand Build, Crash &lsquo;em Cars Kinetic Sand Build is an all-new formula that holds its shape while you play! Now you can build, race and crash with the Crash em Cars Playset! Customize cars by molding Frames, Engines, Spoilers and Bumpers and placing them on the Car Chassis. They have real working wheels! The Crash em Cars playset opens up into a double-sided racing stadium! It easily cleans up and stores everything inside. Kinetic Sand Build Crash em Cars is for kids ages 3+. No batteries required.