Trolley runs one direction until it hits the bumper, then automatically reverses direction down to the opposite bumper and when it contacts it, it reverses direction on it's own again and will continue to run it's winding track as long as you like! Set comes complete with everything you see in the pics including the #60 Lionel trolley, 027 tracks, transformer, and a pair of track bumpers.
Tracks can be made into a straight line or any shape you wish. Track needs to be fastened to the board for it to stay together when the trolley hits the bumpers.