Improve balance, coordination, and core strength, all while having fun with the Hey! Play Set of 6 Balance Pods. Each pod is made of safe, flexible and durable PVC material with two sides (one flat and one with bumps) that allow for varied levels of difficulty. These colorful, hedgehog style pods are an exciting way for children let their imagination run wild by designing new games to play that keep them exercising and active. The pods are also ideal for adults to use for workouts, yoga, building core strength, improving posture, body toning, relieving sore feet and more!