Foam pipe insulation (1.5 inches in diameter, at least 6 feet in length—or more if you would like to eventually add more features to your roller coaster) At least one glass marble (or other ...

(If you have foam pool noodles at home ... it toward the floor to make steep slopes. 3. To test your roller coaster, set your marble at the top of the track and let go. Let gravity pull the ...

Try again. Can you get your marble to finish the track? Extra: You can also make roller coasters from foam pipe insulation (available at a hardware store) instead of from paper. This will allow ...