6 Pc. Obstacle Course Ring Set. An obstacle course essential, kids can walk, hop or jump through these colorful hoops as they move through the course. Not just for fun, our rings will help kids improve their overall coordination and balance. These colorful rings are made of high-impact plastic to withstand years of heavy use. Comes in red, yellow, green, purple, orange and blue. 20" diameter, 1/4" thick. For indoor or outdoor use.