Practise your super hero fighting skills on The Avengers Bop Bag. There's plenty to punch as the bop bag inflates to 75cm tall. It's also got a weighted base so Hulk will wobble and keep coming back for more! Best of all, this Marvel bop bag is perfect for venting anger when you've got extra Perfect for both indoor and outdoor use, have lots of fun with this Marvel Avengers bop bag for kids.homework. A great gift for ages four and up.