Ideas and ideas for junior high school tech inventions don t be too whimsical ! Guys help

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After each laundry, it is often a hassle to pick out pairs of socks to hang them on. Although it is possible to fix the pair of socks with a buckle before washing, this method tends to deform the socks after washing, makes them uncomfortable to wear, and is not suitable for women's nylon stockings.

Washing socks can effectively solve the above problems. During the sock production process, a gap is left at the cuff of each pair of socks. Before washing the socks, the toes of the pairs of socks are passed through the openings of the paired socks and pulled together to form a slipknot so that the pairing can be maintained during the washing process.

When washed, it can be easily untied and hung together.

It's the season of tying your hair again, teach you how to make simple hair accessories, and let you ask for the remnants of your hands.

The magnetic duckling glues two pieces of paper together, cuts two "ducklings" and paints them, and wears a magnetic needle between each duckling, and the tips of the two sewing needles should have different polarities. Each duckling is secured to a piece of cork and placed in a basin of water.

Since the duckling has a magnetic needle on its body, it must be affected by geomagnetism. You'll see that the two ducklings will move close to each other in the direction of the magnetic field lines, and finally stop mouth-to-mouth or tail-to-tail, and their heads and tails will always go in a north-south direction.

Cigarettes are knotted. Wrap the outside of the cigarette tightly with cellophane, tighten the ends tightly, and then tie the cigarette in a knot so that it will not break or break.

If there is no cellophane wrapping, the pressure of the cigarette is concentrated in a few places when it bends, and it will burst there. The cellophane pulls strongly, and it distributes the pressure evenly throughout the cigarette, so it doesn't break. After untying the knot, you only need to straighten and flatten the cigarette to return to its original appearance.

Materials: correction fluid, small fan, half a ping-pong.

Ping Pong, wire, bai tape, double face tape, as long as it can be fixed, you can make a hole in the center of the table tennis dao, a small fan connected to the wire through the hole, wire through the hole.

2. Form a simple circuit at the end of the correction liquid (a section that cannot produce liquid) (physics science) 3. Use a fixed thing to fix the small fan at the end of the correction liquid. Connect the circuit. As soon as you press the switch, the fan will turn.

The correction liquid does not like to dry after coating, and after coating, turn it around and start the switch to blow dry Try to look at it well, but it is not very practical.