arms and chest can be combined with parts from 2 other mechs: Sora’s Elemental Tech Mech (71807) and Kai’s Elemental Fire Mech (71808) (sold separately). Children can have hours of fun as they mix and match pieces to create a unique action figure. The ninja toy includes 2 Ninjago minifigures: Cole with a mini katana and a Wolf Mask Warrior with a sword. The set can also be built using the Builder App