You could buy a k'nex roller coaster, Icoaster, RCT3, Nolimitscoaster or just make one using wire for supports and use aluminum foil for the track.
Steel
you can build a roller coaster, ride it, and print it on the website that is attached as a related link.
First you build a roller coaster, thean build a building over the roller coaster, its that simple.
Its HARD for little kids and teenagers. Nobody can build won but roller coaster engieners
Click on Giga coaster.
See the straight coaster picture and curve ones? Click on them to build a piece. Its the same as the turn tracks and straights.
£1
The model uses less energy than the real one does.
1904
They Did It In The First Episode
June 16, 1884
Yes, knex roller coaster sets come with instructions to build the model in the picture and sometimes even other models. Most of the instructions are also available on-line as PDFs for download.