Happyxuan DIY 4 Channel Hydraulic Excavator Kit Kid Science School Project STEM Education Physics Fun Toys Technology Experiment
Suitable age: over 8 years old
01 hydraulic arm
02 hydraulic excavator
Principle: Hydraulic transmission is a transmission mode which uses pressurized liquid in closed system to transfer motion and power. It converts the mechanical energy into the pressure energy of the liquid, and then the pressure energy of the liquid into the mechanical energy.
Note: the price is for 1 set. Some steps needs parent's guide. Do not leave air in syringes and hoses.
The product has electronic English instruction. Please contact us if you need.Thanks.