This is great. What happens when you bet a group of friends they can’t build a roller coaster in their backyard for under $50? They build one. They built it almost entirely out of old forklift ...

This was the start of the CoasterDad Project. Excited by the challenge of building a Backyard Roller Coaster, [Will] also thought it would be a fantastic opportunity to teach [Lyle] about physics.

An curved arrow pointing right. In 2001, John Ivers of Bruceville, Indiana, built a makeshift roller coaster in his backyard. He named it Blue Flash. It even has a corkscrew. But the most ...