The best answer is a small fan, which 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 leaking out of the foam). Then connect the wires to the battery and stuff them into the foam with scissors. Cut small pieces of paper into rows and put them on the rotor shaft of the small motor!
Tell us 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!
Most of the clothes drying racks that are popular nowadays do not have windproof function. Users often encounter this annoying thing: a piece of clothes that has just been washed is hung on a rope to dry, and when the wind blows, it falls to the clothes. The floor needs to be washed again. The self-locking windproof coat hook I invented can relieve everyone's worries. The above picture is the schematic diagram of the self-locking windproof clothes hanger: In the above picture, (1) is the lock sleeve, (2) is the lock column, which forms a lever through the rotating shaft (3) and the crank (4), and the lever is in the counterweight Under the action of (5), it rotates with (3) as the fulcrum. When drying clothes, just hold up the crank (4) with your hands or a hook. Under the action of gravity, the lock sleeve (1) and the lock column (2) will automatically separate. The user can smoothly hang the clothes hook on the rope, and then Release the crank, and under the action of the counterweight (5), the lock column (2) will automatically combine with the lock sleeve (1) to complete the self-locking process and form a lock with the hook (6). No matter how the wind blows, it will Will not fall automatically. The process of removing the clothes hanger is also very simple: just lift the crank (4) upwards by hand or a hanging hook, the lock will automatically open, and the user can easily remove the clothes hanger. The self-locking windproof clothes hanger can not only be hung on a rope by hand to dry clothes, but if the clothes are hung to a higher place to dry, the user does not need to climb up, just use the hanging hook to support the crank, and it can be hung easily Or remove clothing. At the same time, the clothes hanger also has the characteristics of simple production, good reliability, and low cost. This little invention of mine has obtained a national invention patent.
The cover of this carton is usually covered to prevent dirt and dust from entering. When you want to access the paper in the box, you only need to lift the lid. As the lid is lifted, the paper in the box will automatically be lifted up, making it very convenient to access. After use, just cover it and it will return to its original position. This automatic carton is best suited for holding toilet paper in toilets. The size of the carton can be designed according to your own needs. Provided by the China Education Star Multimedia Teaching Resource Library