Put on the Hulk Muscles & Mask and pretend to bring Hulk's super-human strength into the battle! The Avengers are assembling to take on their greatest enemy: Ultron! Can they defeat him and save humanity? The Avengers will need all of their power to defeat Ultron and his army of drones. Put on muscles that get bigger like Hulk's! Hulk Muscles & Mask lets you unleash mega muscles just like the Avengers' mightiest hero!