Bullet Points:

[3-in-1 Function]
The Robotic Arm Edge Kit can freely change the working head: grasper, grab, suction cup.So that the operating lever can easily control various ioint activities of the mechanical arm,

[Hydraulic Power Principle]
The toy does not need electricity and a motor, as long as water can drive the mechanical arm. Explore the Magic and Fun of Hydraulic Power

[Safe ABS Material]
The hydraulic arm edge kit is a construction toy that is made of high-quality ABS material, BPA-free, non-toxic and safe, harmless for kids.

[STEM Educational Toys]
The STEM educational toy is designed to improve children’s science, technology, engineering, and math skills, which trains children’s logical ability and practical with ability and explores scientific principles.