The Hedstrom Hopper ball is the original Hopper. Hedstrom has been making toys like the Hop Ball since 1913! Quality Hop Balls come from Hedstrom. Hop Balls promote coordination, balance, and exercise. This is one of the best toys for children's exercise. With the ability to hop indoors and outdoors this is a must have toy for any parent or grandparent. 15 inches in diameter make it perfect for children ages 4-6 and easy to transport and store away. No more waiting to inflate you hop ball, you can grab your hop ball and get to hopping! Hedstrom Hopper Balls are designed to last. Made from durable vinyl you'll be able to hop anywhere you please and rest assured your hopper ball will stay inflated and bouncy. The Hedstrom Hopper Ball ships deflated but can easily be pumped up with any hand pump or electric pump. Our Hedstrom Hoppers are one of our most iconic toys in our storied history. These can be used inside or outside, we do recommend staying away from sharp/rough objects, like rocks and sticks. We can't wait to see how much fun your family will have on our Hoppers! This is sure to be your child's favorite Avengers toy and get them out and exercising! Whether it's just bouncing around the house or having a hopper race outside, the fun is endless on our Hedstrom Hoppers!