California dad spent $3,500 building 180-foot backyard roller coaster for son

A 10-year-old California boy asked his father if they could have a roller coaster in their backyard. His father said yes, then spent six weeks turning the idea into a working ride.Will Pemble, an e-commerce consultant in Orinda, California, built a 180-foot roller coaster through the trees on his family's quarter-acre property for his son, Lyle. The project cost about $3,500 and involved roughly 300 hours of work.“I started building the coaster because, Lyle, my son asked me if we could, and I couldn’t think of a good reason to say no,” Pemble told KPIX-TV.The idea took shape after a family trip to an amusement park, where Lyle became interested in roller coasters and started researching how they worked.From amusement park ride to backyard projectLyle's interest grew after riding a roller coaster during a family trip.