Unleash endless fun and healthy activity with the Bluey 42" Bop Bag: Standing at 42 inches tall (when fully inflated), the Bluey 42" Bop Bag offers action packed fun that encourages exercise and helps children burn off energy while taking a much-needed break from screen time. Featuring a weighted base that can be filled with water or sand (not included), it provides exciting bounce-back action—bop it, and it comes right back.