Max Traxxx Marble Tracer Racers Gravity Drive 6 ft Tube Traxxx Kit Max Traxxx brings you the coolest racing experience ever with Marble Racers Gravity Powered Light-Up Racing! Marble Racer racing cars feature an interior marble with a motion-activated LED light inside - as the car races along, the lights flicker as the marble spins making the cars look like they are flying at breakneck speeds!! Attach the track start to a window or door via suction cups or by hanging it from a doorknob - then 3-2-1... let the cars drop down and fly over the track for amazing light-up fun! Glow in the dark tracks are customizable by combining sets with Max Traxxx Tracer Racer track modules - create any track you can imagine! Special set includes a Special Edition Racer, two 2 ft sections of extra track and 2 ft of tube track for a cool tunnel!