1. Weight: 200 g 2. Size: 20 x 15 cm 4. Material: Wood + croissant nail + screw + PC hose + syringe + woodworking glue 5. Applicable age: 3 years old and above 6. Ability training: Manual brain, interest development, intellectual development, sensory, parent-child communication, hand-eye coordination, interactive toys 7. Working principle: Designed using the principle of air pushing, and controlled according to the change of air flow, it can work like a simulated excavator 8. Warm reminder: The material of this kit is made by hand, the process is complicated; the accuracy cannot be compared with that of the machine; 9. Difficulty of assembly: ???? After the production is completed, the pneumatic cylinder of the syringe is used as the power to realize the movement of the mechanical arm. The shortcomings of the baby are that the production of the instruction manual is simple, the production is 4 stars, and the production is more complicated. It is recommended that children with strong hands-on ability learn to make, or the parent teacher instruct
