Build Your Own Hydraulic Robotic Arm

Using scientific principles of hydraulic systems, you can create your own Hydraulic Robot Arm powered completely by water. Great for budding engineers or anyone interested in science, this build-it-yourself kit comes complete with 229 pieces and instructions. 


  • Johnco activity sets
  • Design: Build Your Own Hydraulic Robotic Arm
  • Pack contents: 229 pieces & full instructions
  • Powered by water (no batteries or motor required) 
  • STEM learning 
  • Lever controllers 
  • Vertical reach of 41.5cm
  • Extends past 30cm 
  • Lifting capacity of 50gms 
  • Wrist rotation: 180 degrees
  • Wrist mobility: 98 degrees
  • Base rotation: 270 degrees
  • Shoulder motion: 45 degrees
  • Elbow motion: 44 degrees
  • Materials: N/A 
  • Recommended for ages: 10+ years 
  • Dimensions (approx. cm): 40 x 29 x 11 (W x H x D)
  • Country of origin: Taiwan 
Product Specs


Shipping & Returns

Leaves warehouse in 1 - 2 business days

*Estimated Delivery between 8/07 and 13/07. This is an estimation based on the sellers past performance. Actual delivery time may vary.


Catch takes care in ensuring all goods sold are of the highest quality. However, if for any reason you find a fault with one of our products, we are here to help. Please contact our friendly customer service team who will assist with a timely resolution.

Please view our returns policy HERE


This product is covered by our 12 month Catch warranty