Preparation materials: an empty beverage bottle, two foam fruit nets, a rubber band and a glass ball.
Production process:
1. Take an empty 250ml beverage bottle and cut off the upper part of the bottle body;
2. Divide the cut part into 8 parts, cut it to the bottleneck with scissors, and then cut each part into a petal shape with the same size;
3. Cover the foam fruit net outside the bottle and fix it at the mouth of the bottle with a rubber band;
4. Wrap a glass marble with another foam fruit net and plug it into the bottle mouth until it is exposed about1cm;
5. Cut off half a table tennis ball, cover the bottom of the hemisphere on the bottle mouth, cut the four sides into whiskers, cover the bottle mouth and fix it with rubber bands.
6. After beautification, a homemade badminton is finished. Hit a dozen with a badminton racket and see how it works.
2, homemade soap paper
Production materials and tools:
White paper with good water absorption, small pieces of soap, writing brush and disposable beverage cans.
Production method:
Chop up the soap first, put it in a jar, put a proper amount of water in it, heat the cup on the stove, and when the soap melts, cut the white paper into the size of a matchbox, coat it with soap one by one, then take it out and dry it in the shade, and you can make soap paper.
3. homemade hot air balloon
1. First, we cut 6-8 leaflike pieces of paper from soft paper.
2. Fold them in half and stick the edges together to make a balloon.
3. Stick the four connecting wires to the bottom of the balloon with adhesive tape. Fix the other end of the line on the table with plasticine.
Try to set the speed of the hair dryer very slowly. Aim the air outlet upward at the opening at the bottom, and then turn on the switch. The balloon will gradually get bigger, tighten the line and leave the table.
4, homemade flashlight
The specific manufacturing method is: lift one end of an abandoned can (such as Lulu beverage can) and beat the other end with a round hammer. Roll up two 1 batteries with thick corrugated cardboard and put them in a can, with the positive pole facing up and the negative pole facing down. Find a suitable plastic cover (for example, the magic big roll cover can just be buckled on Lulu's beverage can), and dig a round hole in the center of the cover, the size of which is suitable for the light bulb to be inserted tightly. Insert the bulb base into the small hole. Take a section of tracing wire, peel off the wire skin at both ends, wrap one end around the lamp cap, and tie a small hole at the other end from the side of the plastic cover. Put the plastic cover on the jar. Check whether the bulb and battery are in close contact. Disposable flashlights will be ready here. When in use, press the wire on the side wall with your thumb on the unpainted weld away from the can, and the flashlight will glow. When your thumb jumps off the wire, the flashlight will go out, which is very convenient to use.
5, homemade solar cookers
Find a concave reflective bowl on a big flashlight, and cut it into a cylinder about 4 cm long with rigid foam plastic or wood, just enough in diameter to fit into the round hole of the reflective bowl. Drill a fine hole horizontally at one end of the cylinder, insert an iron wire with a diameter equivalent to the aperture, and then bend the two ends of the iron wire exposed outside the cylinder at 90 degrees, leaving 5 cm each. Insert the cylinder into the round hole of the reflective bowl, and then insert both ends of the iron wire on the foam plastic or wooden bottom plate. Sharpen both ends of a thin bamboo stick, insert one end into the cylinder in the center of the reflective bowl, and insert a small piece of potato at the other end. Put the device in the sun, let the reflective bowl face the sun, and then, patiently adjust the length of the bamboo stick so that the inserted potatoes are just in the focus of light. Before long, the potatoes will be cooked by the sun and smell delicious.
6.compass
Compass is one of the four great inventions in ancient China. It is very useful in daily life. It is made according to the principle of magnetism.
Take a piece of plywood and saw out a bottom plate with a diameter of120 mm. Sandpaper surfaces and edges. Mark the symbol on a piece of lead drawing paper, cut the disc according to the size, stick it under the chassis, take a pin or sewing needle, pass through the center of the back of the chassis, and expose the tip of the disc as the shaft. Cut a piece of tin foil into the shape of a pointer according to the size, drill a hole with a diameter of 2 mm, and fix a button on the pointer. Touch the pointer with a permanent magnet several times to magnetize the pointer. Finally, put the pointer on the axis. Pay attention to which end points to the north and color this end red.
When using, don't let the pointer touch the strong magnet, so as not to affect the magnetic pole of the compass.
Respondent: 2520453- Grade II 2009-4-24 13: 13
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