LEGO The Batman Movie Harley Quinn Cannonball Attack 70921 contains 425 pieces and brings together Harley Quinn's truck and two small Gotham City buildings. The truck features a large raising and rotating cannon from which the Harley minifigure can be launched, plus opening doors and bonnet. The buildings include an ATM, dynamite and an articulated ladder. It includes 4 minifigures and a rat figure, with characters related to Harley Quinn and Batgirl.