Obstacle House! Frog Leap US PATENT # 9,047,786. "A Parents' Choice Recommended Award Winner 2013!" Children practice agility, coordination and endurance by engaging in a simplified version of the moving squat leap using both their upper and lower bodies. Stickers located in the bottom right corner of each mat guide very young children as they put together the exercise puzzle. Patent pending. Made of lightweight, washable, durable interlocking 3/4 inch thick EVA foam mats. Mats are heat-branded with double feet, double hands, and arrows to help young minds learn movements and patterns. Includes 8 green mats, 3 blue mats, an Obstacle House! title mat, and an arrow mat to be used when adding other obstacle sets.