Kids can build Batman’s helicopter using a special Starter Brick chassis, along with an Arkham Asylum prison, Harley Quinn’s bike, and a mobile catapult—all designed to inspire imaginative adventures. The set includes four LEGO minifigures: Batman with a Batarang, Harley Quinn with a baseball bat, The Joker, and a prison guard. A simple building guide helps young builders understand each step and gain confidence as they begin their LEGO journey. When assembled, Arkham Asylum stands over 8 inches (21 cm) high, 9 inches (23 cm) wide, and 3 inches (10 cm) deep, while Batman’s helicopter measures over 3 inches (9 cm) high, 5 inches (14 cm) long, and 1 inch (4 cm) wide. With 171 pieces, this set is suitable for boys and girls ages 4 and up, and it’s compatible with all other original LEGO sets for even more creative building fun.