With Arin's Battle Mech (71804), kids aged 4 and up can practice building blocks and join the heroes in their quest to save their dragon friends. This action-packed toy features an awesome mech that will remind kids of the thrilling adventures from Season 2 of the NINJAGO® Dragon Rise TV series. This LEGO® toy includes 2 minifigures: Arin with a katana and a wolf mask warrior with a sword. Arin can fit into a posable mech with a large sword and spinning blade, and the wolf mask warrior can fly on a glider with movable wings, disc shooter and 2 spears. There's also a brick-built crystal cave with a mace of shattering and a weapon rack with 2 golden katanas. This ninja building set is designed for kids aged 4 and up who are just getting started with LEGO bricks. It comes with a starter brick that is a partially assembled base, so kids can get started building without hesitation.