Kids can move the booster anywhere along the flat track, lock it into place, and watch as their cars zoom through to the next stunt. This all-in-one set features an adjustable kicker, 3 track pieces, track connector, flipper, and one 1:64 Hot Wheels car. Makes for an awesome gift for someone just starting their build or as add-on to an existing set (sold separately). The rubber-band kicker moves along the track when kids press the button. Releasing the button locks it into place on the track. This exciting booster is great for kids 6 years old and older.