The RollerCoaster Construction Set contains over 300 parts yet is intuitive and easy to assemble, alter and disassemble. Though creatively challenging, the large blocks of required assembly time and resultant frustration, common to many other construction sets are noticeably absent!…Our “Child-Safe” Lift Mechanism (Patent Pending) has no exposed belts, gears or pulleys to cause problems with younger coaster designers and no height limit for those aspiring to reach for the ceiling. The Lift Mechanism pushes the carts up your slope for true roller coaster action.