The Jurassic World Bop Bag is action-packed punching and kicking fun that encourages exercise, helps kids burn off energy and provides an important break from screen time. The bop bag can also help kids learn to appropriately release anger and frustrations. Features bold, colorful graphics of Jurassic World Dinosaurs. Bop bag has a weighted base that can be filled with ½ gallon of water or approximately 5 pounds of sand for exciting bounce-back action. The single-direction inflation valve makes for quick inflation with any hand or foot pump (not included). For best results, fill base first and then inflate bag. Support the base when moving bag. The Jurassic World Bop Bag is 36 inches tall, 10 inches diameter when fully inflated. Recommended for ages 4 and above. Once inflated, the bop bag is sensitive to cool temperatures. If stored in a cool area or used outside in cool temperatures, bop bag may need additional air. Includes 1 patch kit.