Custom Mechanical Arm STEM Kit

This Hydraulic Mechanical Arm STEM Building Kit is an engaging DIY educational toy for kids aged 8 and up, featuring 106 plastic pieces for self-assembly. It combines two exciting play modes: launching safe EVA discs and grabbing objects with its claw, powered purely by water—no batteries or motors required.

As children build and play, they learn fundamental hydraulic principles through hands-on experimentation, making it an ideal tool for STEAM education in schools and after-school programs. The assembled arm measures 35.3×15.3×6.8cm, with colorful packaging and 18 units per outer carton (85×44.5x67cm).

Certified by EN71, ASTM, CPC and more, it meets strict international safety standards. We offer bulk wholesale and OEM/ODM customization, perfect for schools, toy brands, and educational institutions looking to enhance their STEM product offerings.