Perfect Combo: Total length 62cm, folds down to 30cm, equipped with a soft sponge protective cover (remember to put it on before use to protect the ankle) and a portable storage bag for convenient carrying and storage. Helps improve childrens coordination and motor skills. Safe Material: Made of environmentally friendly PP and PVC materials, safe to use. Reduces noise and prevents floor damage. Recommended for children ages 3 and up. (Ecofriendly material, reusable) Builtin LED: Flashing (induction design), the roller lights up automatically, especially at night. Adults can also play with their children. This is a very interesting and healthy game that can improve the relationship between you and your kids How to Use: First, put the tail ring on one foot, then rotate forward or backward. Twist the rod to the other foot, lift the other foot, and step on it with both feet. Bouncing ball toys for children to exercise and play, your kids will love it Best Choice for Indoor or Outdoor Sports: Lets jump together This jump ball helps your children stay active and healthy. This is the best gift for children, birthdays, Christmas, and New Years.