To the Batcave, Robin! The Joker is using his crazy catapult to smash the Batcave! Can the heroic crime fighters race to the scene in the Batmobile and lock him up in the prison cell before he wins? This Easy to Build set has all you need to develop your child’s building skills ...To the Batcave, Robin! The Joker is using his crazy catapult to smash the Batcave! Can the heroic crime fighters race to the scene in the Batmobile and lock him up in the prison cell before he wins? This Easy to Build set has all you need to develop your child’s building skills. Create a world of iconic super heroes and villains, from the giant archway to the cell for holding bad guys. Easy to Build elements are perfect for developing building skills and LEGO Juniors is the perfect introduction to LEGO brick building.