Couple builds a DIY roller coaster at home for $700

Some become parents by choice, and such parents give their children the best lives possible. How else would you describe an Ohio couple who built a roller coaster in their backyard for their kids?Jon and Natasha Cain of Lancaster, Ohio, spent a few weekends and $700 on something their kids would remember for years: a roller coaster in the backyard, according to a report by ABC News. They had no engineering training but had the willpower to teach themselves the basics of how a roller coaster works.A summer projectMost kids would spend their summer holidays at a theme park. But often, the thrill of a ride is accompanied by a long queue. In the summer of 2009, the Cains took on the project of building a roller coaster. They used readily available materials that one could pick up at a local store: wood, concrete and PVC pipes. They put it together for their two children, daughter Olyvia and son Samual.The finished track rises 12 feet at its highest point and winds through a series of twists and turns. They worked on the roller coaster for three weeks and spent $700. But building a ride was not simple. It had to hold a child, negotiate tight curves and remain upright throughout every ri...