The Joker uses his balloon backpack to escape from Batman in this LEGO set. This set contains over 120 pieces, including minifigures for Batman and the Joker. Create the Joker's balloon backpack using balloon and flame elements. Other accessories include a power plant with exploding silo feature, the Joker's long coat tail, Batman's utility belt, and Batman's grappling hook gun. Suitable for builders aged 6 and up.