Energetic kiddos safely redirect active energy with a durable boxing set that grows with them! It's quick and easy to assemble: pump up the bag, fill the base with sand or water, enjoy years of punching play. The pole adjusts from 26.5" high to 40", making it ideal for ages 4-8. We love this healthy, fun exercise that develops hand eye coordination and teaches confidence! From National Sporting Goods for ages 4+ yrs.