First, hollow out the solid foam, connect the small motor with wires and stuff it into the foam (to prevent the rotor shaft of the small motor from leaking foam). Connect the wire to the battery, plug it into the foam, cut the small pieces of paper into rows with scissors and put them on the rotor shaft of the small motor!
The invention and production.
A small fan only needs a small motor, two 5th 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 (to prevent the rotor shaft of the small motor from leaking foam). Connect the wire to the battery, plug it into the foam, cut the small pieces of paper into rows with scissors and put them on the rotor shaft of the small motor!
Sprinkle a water bottle. Take a jar and poke some holes in the tail.
Take an empty eggshell and coat it with wax (thin)
Draw a picture on it with something sharp (cut the wax)
Soak in vinegar for a few hours, and remove the wax.
The carved place was darkened by acetic acid.
Turned into a small production!