Avengers Bounce Balls are double-sided with the Avengers symbol on one side and an image of Thor, the Incredible Hulk, Iron Man, and Captain America on the other. Give bounce balls away as a party favors or prizes. Avengers Bounce Balls also make a great birthday gift for a die-hard Avengers fan! Package includes 4 Avengers Bounce Balls, each measuring 1 1/4in.