LEGO® NINJAGO® Arin’s Spinjitzu Battle Mech (71839) is a 213‑piece set for builders aged 7+, inspired by NINJAGO: Dragons Rising Season 3. The posable mech features movable arms and legs, a rotating torso, an opening cockpit for a minifigure, and two large sword accessories. Kids can also swap body parts with other customisable mechs from the 2024 NINJAGO range to create their own ultimate mech. The set includes Arin with a crystal katana, a Spectral Dragonian Warrior with a sword, and a Baby Riyu figure, perfect for staging epic good‑versus‑evil battles. Age recommendation: 7+