360 ° rotating base+alloy bucket with adjustable upper and lower arms, sand digging depth ≈ 15 cm, simulating real hydraulic action. No sharp angle design, widened edge of the digging bucket wrapped with glue, without pinching hands or damaging the sand pit. Comes with an "Engineering Task Card": 8 challenges including digging trenches, stacking mountains, loading trucks, and building dams, to cultivate children's spatial planning and logical sequence. It can be paired with dump trucks and rollers of the same brand to form a "mini construction team" that supports multi person collaboration and enhances social skills. Usage scenario: Home balcony sandbox; Kindergarten Sand Pool Corner; Outdoor beach camping.