HYDRAULIC ROBOTIC ARM-FLYING DISC

With just a little water! Let you own a dominating robot! In an 
ever-changing era, owning a hydraulic manipulator can keep you 
at the cutting edge of the times! Hydraulic manipulators combine
science, technology, engineering, and mathematics in the fields 
of science. Without requiring batteries or motors, they can 
convert power through water pressure to trigger mechanical 
transmission. You can not only launch 8 safety foam flying 
saucers successively, but also pick up various items such as 
bottles, balls, and blocks. This is a fun challenge, which is suitable 
for both left and right hands. Through the theory of hydraulic 
power, children can assemble them themselves to improve the 
hands-on ability and stimulate interest in science. Let's do it! 
Future scientists!