Hydraulic Robot Arm

The Hydraulic Robot Arm by Johnco lets kids build a working robotic arm that moves, lifts and grips using real hydraulic power – no electricity required. By pushing and pulling the control syringes, children can rotate the base, raise and lower the arm, bend the wrist and open or close the claw to pick up objects. It’s hands-on engineering that shows exactly how machines can move using pressure and fluid, making science feel practical, powerful and fun for curious 10-year-olds. It will also challenge the beginner engineering enthusiasts.

Key features
• Build-your-own robotic arm powered by water hydraulics
• Controls allow rotation, lifting, bending and gripping actions
• Demonstrates real hydraulic principles without motors or batteries
• Includes multiple joints for precise, multi-directional movement
• Designed for hands-on learning and repeated experimentation

Developmental value
• Builds problem-solving and logical thinking through assembly and control
• Strengthens fine-motor skills and hand–eye coordination
• Encourages curiosity about engineering, mechanics and real-world machines
• Builds confidence as kids master complex movements and tasks

Specifications
• Includes robot arm components, hydraulic tubing and illustrated instructions
• Powered by water-filled hydraulic system
• No batteries required
• Made from durable, child-safe materials
• Recommended for ages 10 years and over