A small fan only requires a small motor, two AA batteries, some short wires, a solid plastic foam, a pair of scissors, and some cardboard!
First hollow out the solid foam, connect the small motor with wires, and stuff it into the foam (keep the rotor shaft of the small motor from leaking out of the foam). Then connect the wires to the battery and stuff them into the foam. Use scissors to cut out the small paper. Cut the pieces into rows and put them on the rotor shaft of the small motor!
Talking about invention and production.
A small fan only requires a small motor, two AA batteries, some short wires, a solid plastic foam, a pair of scissors, and some cardboard!
First hollow out the solid foam, connect the small motor with wires, and stuff it into the foam (keep the rotor shaft of the small motor from leaking out of the foam). Then connect the wires to the battery and stuff them into the foam. Use scissors to cut out the small paper. Cut the pieces into rows and put them on the rotor shaft of the small motor!
Sprinkle bottle. Take a can and poke a few holes in the tail.
Take an empty egg shell Coat the outside with wax (it needs to be thin)
Use a sharp object to draw on it (it needs to carve through the wax)
Put it in vinegar for a few hours and take it out to remove the wax< /p>
The color of the carved area is darker with acetic acid
It becomes a small production!