The ultimate DIY construction challenge. A dynamic deluxe perpetual steel ball roller coaster. For those of you out there that are looking for a challenge then the Spacerail 5 is for you, for those that would like less of a challenge then there are lower levels that will get you started. This amazing glow in the dark perpetual roller coaster will not only give hours of fun in the building but will continue to amaze and amuse you once complete. The steel balls will travel along 32,000mm of jaw-dropping see-saw drops, loops, twists and stunts as it runs the track. A Labyrinth of track that is out of this world.