Hand power generation: Size 8 * 10 * 11 Rotating the mechanical arm, through the belt pulley, big wheel with small wheel, small wheel with big wheel, do more power to generate current. Working...
The wooden steamer of this kit is beautiful in appearance, easy to make and easy to succeed, and is suitable for children in lower grades to make early education.
Make a steamer with your own hands,...
It is composed of tank, carriage, battery, driving belt, pulley, driving mechanism.
After the power is turned on, the power wheels on both sides of the deceleration motor output power and drive the...
DIY taxiplane:
Advantages:
Good exercise of children's hands-on and brain-building ability, cultivate children's interest in scientific physics experiments, and improve their creative ability. More...