The simple movement of the Cardio Kids Moonwalker has captivated thousands of children throughout the world! While teaching balance and coordination it helps to maintain a child's heart rate when used a “cardiovascular circuit." Its simple tension free motion captivates children of all ages! Shipped freight, fully assembled, sized and proportioned for children. The Moonwalker resistance-free unit, builds balance and endurance. Choose from 4 sizes: • EARLY ELEMENTARY 28"L x 30"W x 42"H. Weighs 95 lbs. For ages 3-8. • ELEMENTARY 36"L x 42"W x 46"H. Weighs 95 lbs. For ages 7-12. • JUNIOR HIGH 36"L x 42"W x 46"H. Weighs 95 lbs. For ages 11-15. • HIGH SCHOOL & ADULT 36"L x 42"W x 46"H. Weighs 105 lbs. For ages 14+.