World's second greatest paper roller coaster/marble run
I used to called this the World's greatest paper roller coaster. I've made a much better one recently so I thought that the name of this one was no longer correct. See the video responses below for my best coaster ever.
This is a short video showing an amazing paper roller coaster in action. They're made out of nothing more than card stock and tape but can be over eight feet tall. They're great for teaching physics and motion. Buy directions and templates at www.paperrollercoasters.com