TechEBlog on Twitter: "Teen builds incredible roller coaster in backyard using PVC pipes and wood, fun ensues. https://t.co/RBFqH3evgD #geek #design #awesome https://t.co/tFICL85SxE" / Twitter
Designing a Safe Backyard Roller Coaster with Paul Gregg - Coaster101
Watch These Parents Send Three Year Old on Homemade Roller Coaster