Crystal Collector Armor (Qiji 2413-4)

About this set

Pick-a-Crystal Ironclad is a deep-sea diving mech from KEEPPLEY's Crystal Squad line, set 2413-4. The box marks 6+ and a difficulty of 2/5, with 131 pieces. Yellow and blue dominate the color scheme, accented with red and clear parts; the standout feature is a transparent cockpit, backed by mechanical arms, a searchlight, diving gear and a seabed crystal scene, and the box lists 3 minifigures. Build the seabed crystal scene first to fix the display position, then assemble the mech body. Clear pieces like the cockpit and searchlight need careful alignment when pressing them into place, and test-fit the mechanical arm joints before locking them so you don't have to pull them apart again. The structure is straightforward, making it a good pick for kids new to building and for fans of deep-sea themes, with three minifigures to pose around the scene.