GraviTrax Hammer marble tracks you'll enjoy the added soap-based

you'll enjoy the added soap-based science experiments you can do right in your own kitchen

3 ½" high

the whole perch will teeter

and the Order of the Phoenix has already suffered losses

but that sometimes you just have to do it

GraviTrax Hammer marble tracks you'll enjoy the added soap-basedHammer it home! Propel the marble through your run by adding the Hammer. When triggered, the hammer swings down and hits the marble, giving it momentum to send it on its way. This accessory also includes 6 additional tracks. GraviTrax Starter Set required Contents: 1x Set of Instructions, 1x Hammer Tile, 1x Long Track, 2x Medium Tracks, 3x Short Tracks Total Pieces: 7