Joyfy 47 inches T-Rex Dinosaur Bouncing-back bopper is designed with water inflatable base which allows you to stabilize the bopper. Which makes the bopper easy to store after deflation. Please follow the instruction for regular use and non-stop bounce back. Firstly, please fill at least 2.5kg water to stabilize the bopper (sand is not recommended as it is not easy to clean). Secondly, please inflate the body with an air pump. After use, it is recommended to drain water from water outlet, then fold and store it. Our Blow up Punching Bag is a perfect gift for kids for any occasion - birthday, christmas, thanksgiving etc. Our inflatable punching toy is made with high quality PVC material which holds up against vigorous punches and kicks from playing and training. Kids can kick, punch, roll for fun from indoor and outdoor playing. Get your kids away from the media to create a healthy life! This will be an ideal Christmas gifts, birthday gifts, New Year gifts, and Easter gifts for kids and adults. Suitable as Halloween party games and Christmas party games. | Joyfy | | T-Rex Dinosaur Inflatable Punching Bag for Kids 47" Blow Up Bopper Bouncing-Back Indoor Outdoor Toys Xmas Birthday Gifts | Blue Green | Best Buy