
Check out
CoasterDynamix, the world's premier manufacturer of realistic roller coaster models. These aren't just kid's toys (like the K'nex or Spacewarp building toys) -- CoasterDynamix kits are fully functional, highly detailed scale models.
My pal
intocoasters back East has customized the heck out of his, by adding his own block brakes and software so he can
control three trains at once. And, he's even put
a miniature wireless camera on-board so you can watch the ride (click links to see his videos, they're pretty neat).