Robotic Arm Kit — Hydraulic, No Batteries Needed, STEM

Build a fully functional hydraulic robotic arm — no batteries or motors required. Uses water-powered hydraulic pistons to grip, lift, and rotate objects. Over 229 pieces assemble into a working arm with 6 axes of movement. Teaches hydraulics, mechanical engineering, and physics principles through hands-on construction. Detailed illustrated manual included. Ages 10+.