1. Self-made badminton material: prepare an empty beverage bottle, a net, two rubber bands, a glass marble and a table tennis ball. Production process: 1. Take an empty 250 ml beverage bottle and cut off the top half of the bottle; 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.

2, homemade soap paper

Materials and tools: white paper with good hygroscopicity, small pieces of soap, brushes and disposable beverage cans. Method of making: First, cut up the soap and put it in a beverage can, then put a proper amount of water in the beverage can and heat it on the stove. When the soap melts, cut the white paper into the size of a matchbox, coat it with soap one by one, and then take the white paper out to dry, and get the 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

Material: 1. Abandoned cans 2. Thick corrugated paper 3. Two batteries 1 4. Plastic cover 5. Light bulb 6. A section of conductor is made by removing a lid from an abandoned can (such as Lulu beverage can) and tapping 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 wire, peel off the wire skin from both ends, wrap one end around the lamp holder, and tie a small hole from the side of the plastic cover at the other end. 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

First, find a concave reflective bowl on a big flashlight, and then cut a cylinder about 4 cm long with hard foam plastic or wood, the diameter of which is just enough 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 a right angle of 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. Then sharpen the two ends of a thin bamboo stick, insert one end into the pillar 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. It won't be long before the potatoes are cooked by the sun and smell delicious.

Edit this paragraph 6. Make your own 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 sketch 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.

7. a self-made villain with martial arts

Materials and tools: old brush shaft, colored electro-optic paper, black buttons, red wool, nylon yarn, plywood or toilet paper, pigment, paste, saw, drill, scissors and pliers. Manufacturing method: find one or two waste brush sticks, cut them into 8 sections with a saw, each section is 1.5 cm long, then find a thicker pen, saw it into a section with a length of 3 cm, and drill two small holes in one third. Paste these small bamboo knots with colored electro-optic paper, and draw the villain's face on the top third of the thick knot. Use two black buttons as villain's feet; Then use big buttons or hard paper to cut into discs and stick them on the top of thick knots to make hats, and stick a little red wool in the middle of the hat top to make hat tassels. Bend one end of a wire into a small circle to make a right hand and a pike; Then bend a small circle with iron wire in the left hand, and thread these bamboo joints together with a nylon thread as in the third step. Find a piece of plywood or toilet paper, cut a long seam in the middle of the board, put it at the seam of the table, put the thread sleeve under the villain into the seam of the board, and manipulate the nylon thread from below with both hands so that the villain can move. Pull the thread loose and tight with both hands, and the villain can bend down and raise his hand together; Pull left and right, and the villain can move horizontally. If handled properly, this martial arts villain will use all kinds of tricks to let you appreciate his "superb" martial arts. If you can't find a suitable old brush rod, you can also use other sleeves with holes instead, or use kraft paper strips coated with paste to roll on the iron wire to make a homemade cardboard tube.

Characteristics of small-scale scientific and technological production

The characteristic of small-scale scientific and technological production lies in the word "small" in scientific and technological production

Where is "small"? (1) has a simple structure. Generally, it is good to assemble a few parts. (2) materials are easy to find. You can find many materials at home, such as empty paper boxes, toothpaste tubes, foamed plastics, cans, waste ballpoint pens, broken toys, iron wires, iron sheets and so on. (3) easy to process. The technical requirements of most projects are not high, and primary school students can master them. (4) spend less money. Some projects can even be free, without increasing the burden on families. (5) See quick results. Many projects can be completed in one day or half a day, which is in line with children's psychology and easy to popularize. 2. Activity form (1) Set up science and technology classes to make students generally receive science education and help them make. (2) Establish interest groups to help students make friends. (3) Encourage students to choose their own topics, complete small productions independently, and give appropriate guidance when necessary. 3. The activity content and counseling method (1) are made according to drawings, instructions or printed materials. (2) Small-scale scientific and technological production centered on cultivating creativity and developing intelligence. Mainly to make children's favorite toys, there are the following forms: ① The teacher introduces a small production method and scientific truth, and demonstrates it in kind to arouse students' interest, and students make their own innovations according to this truth. For example, "chicken eats rice" is a painting toy made by using the lever principle. When drawing, the two heads of the chicken move in the same or opposite direction, because the position of the stress point and fulcrum of the lever is different. After knowing the truth, the students designed and made many novel tie-rod toys, such as I went into space by rocket, went fishing with kittens, played table tennis and crossed the canyon. (2) Small technology products that turn waste into treasure. The teacher explained how to use the gears of old clocks and watches and waste toys to design and make new toys. Some students were inspired to complete their own innovative and high-quality mobile toys, such as manual electric roller coasters, electric bumper cars, robots, funny people dancing, owls and mice. (3) Theme Technology Production Competition. According to different grade requirements, students in each class design and produce, and teams are selected in the class, and then grade competitions are held. For example, the fourth, fifth and sixth grades hold windmill races. We stipulate that the wheels of racing cars must be made of thick paper, and ready-made wheels or other substitutes cannot be used. Other sizes, weights and styles are not limited. Again, the rubber band power car competition is limited to rubber bands with uniform specifications and lengths, and nothing else is limited. In this way, the students' enthusiasm is very high, and the racing cars designed and produced are also varied, giving full play to their intelligence and cultivating their creativity. 4. Precautions (1) should be graded according to age, knowledge level, practical ability and hobbies, and different production contents should be selected. The lower grades should choose content that is easy to make successfully, such as small parachutes; It is necessary to raise the difficulty at the intermediate and advanced levels. (2) Promote innovation. (3) no arrangement. (4) Emphasize safety in production.