The WowWee Power Treads Full Throttle Pack features all-surface toy vehicles that come in a set of 40 pieces. The vehicles are designed to be customizable, with snap-on pieces that allow kids to create their own unique vehicle designs. The all-surface treads on the vehicles make them perfect for both indoor and outdoor play. The set also comes with a track guide that helps kids set up obstacle courses and ramps for their vehicles to navigate. With the Full Throttle Pack, kids can build, create, and race their own unique vehicles anywhere they want.