Most theme parks around the country are still closed because of the COVID-19 pandemic. But some families have come up with ingenious ways to have fun and stay active in their own backyards. One lucky kid's parents got creative and hung a 60-foot rope and harness from a tree. One family made a makeshift roller coaster. For Karri Bowen-Poole, who transformed the garage into an American Ninja Warrior course, it was all about making sure her kids stayed active.