Ask for a small science and technology production, and the middle school students will do !!!

Teaching of science and technology small production works in the third grade.

There are a lot of small production content of science and technology, which can be based on their own sources.

preferences and resources on hand to choose. The content that du can refer to, zhi really can't find dao Du Niang again. If you can't do it, you can find me.

How to make a simple alarm clock.

Find a plastic paper cup, make a small hole in the bottom of the cup, circle it with a rope, and then pull the rope slowly.

Simple weather vane.

Materials: Plates, two straws, two pieces of paper, scissors, plasticine, double-sided tape for return needles.

1.Draw a frame on a piece of paper and write the name of the direction, cut it and stick it on the plate according to the direction2Fold another piece of paper in half and ask your parents, grandparents, etc., to draw the arrow and vertical tail for you, glue the arrow and vertical tail to the ends of the straw with double-sided tape, and use a sewing needle to pierce the middle of the straw.

3.Knead the plasticine into a ball, insert the straightened return needle (leaving an elbow) vertically in the plasticine, and then cut a straw and put it outside the return needle, leaving about one centimeter of needle outside.

4.Glue the plasticine base firmly to the plate**, and finally insert the straw with the arrow and vertical tail into the loop needle, and it is done.

The function and principle of the new multi-functional windproof clothes hook are explained.

1. Hang this clothes hook on the ordinary steel wire or plastic clothesline, at this time, the rope part of the clothes hook is clamped tightly on the rope (bamboo pole), and the clothes hook can not move freely on the rope (bamboo pole) to achieve the role of positioning and windproof.

2 Hang the hanger on a rope (bamboo pole) on which you have hung your clothes. The clothes hook can effectively keep the clothes in a specific position on the clothesline at all times, and the clothes do not rotate with the wind and affect adjacent clothes. Allow the garment to air dry evenly.

The dried clothes no longer move with the wind and fight with each other, and the clothes do not stick to the front and back, which is easy to dry and will not transfer color.

3. The width of the hanger can be adjusted at will, which can effectively meet the needs of drying all kinds of clothes, shoes and hats.

Instructions for making a new multifunctional windproof clotheshook.

Make 4 pieces of bamboo 20 cm long, cm wide and cm thick. Drill a hole with a diameter of 1 mm in the middle of each end of the bamboo piece, and use rivets to connect the 4 pieces of bamboo into a square. Choose any two ends and connect them with a 40 cm long clamp rope.

Bitter not bitter cup roaster version good buddy transfer 8 photosensitive drum almost every mommy.

Take an empty egg shell and coat it with wax (be thin).

Paint on it with a pointed object (to carve through the wax).

Put it in vinegar for a few hours, take it out and get rid of the wax.

The color of the carved place is darkened with acetate.

It's a small production!

Electric sofa, just add an electric blanket to the sofa cushion!