1. Hard plastic pipe with uniform material thickness, 3 cm in diameter and 40 cm in length; A soft wooden stick the thickness of a plastic pipe and 5 cm long; Two corks; Two thin sheets of iron; Sewing needle 2. Make a hacksaw, scissors, awl and knife. 3. Manufacturing step ① Cut the plastic pipe from the middle, divide it into two sections with equal length, and drill a small hole at the top and bottom of each section. Then connect the two pipes with a 5 cm long soft wooden stick and pass a sewing needle through the soft wooden stick. (2) cutting the thin iron sheet into two brackets and two figures, and fixing the figures on both sides of the plastic pipe; (3) Fill the pipe with water and plug it with a cork, put the sewing needle on the bracket and adjust the balance of the pipe on the bracket. At this time, water flows out rhythmically from the small hole under the tube. At this time, as long as one end of the seesaw is pressed, the seesaw will automatically tilt upward and fall, and the water on both sides will drop out in turn until all the water drops out. Attention, please put it in the basin to prevent the water from wetting the table. Think about why it goes up and down automatically.

2. Staircar

It is very difficult to carry heavy things upstairs. Inspired by the action of the puppy going upstairs, I designed a car that can carry heavy things upstairs.

When carrying heavy objects upstairs, first push the front wheel of the car close to the stairs and press the handrail, and the front wheel will be lifted by the rubber band.

Pull up and push the cart, so that the front wheel can ride on the stairs above; Lift the armrest again, and the rear wheel is suspended. The rear wheel is pulled up by the rubber band and pushed forward slightly, so that the rear wheel can ride on the next stair? The car climbed upstairs step by step.

3, automatic pumping plug

Students who keep goldfish may know that when using siphon principle to change water in a fish tank, in order to eliminate the air in the pipeline, either fill the water in the water changing pipeline first, or suck one end of the water changing pipeline in your mouth. This is neither hygienic nor convenient.

Find a rubber plug (usually a rubber tube) about the same size as the inner diameter of the water exchange pipe. Tie a strong line through the center of the rubber plug and tie a small weight at the other end of the line.

Before changing water, put the small weight tied on the line at one end of the water exchange pipe and take it out from the other end. In this way, the wire passes through the water exchange pipe, and the rubber plug plugs one end of the water exchange pipe. When changing water, put the end with rubber plug into the bottom of the water. Pull the small weight by hand, pull out the rubber plug from the water exchange pipeline, and at the same time drive away the air in the pipeline, and the water will continue to flow out along the pipeline. If you use a water tank to hold water at home, you can also use this method to pump out the sediment at the bottom of the tank.

4. Draw the angle bisector skillfully

Draw a circle with a diameter of about 1cm in the blank of the transparent triangle, and make a hole at the center with hot iron wire, the size of the hole should be able to be inserted into the pencil tip.

When in use, the circle on the triangle is tangent to both sides of the corner, and a point is made at the center of the circle. The top of the horn

A straight line between a point and this point is the bisector of an angle.

Step 5 turn the bell

With a toy motor, a bell cover and a spring with a small hammer welded at both ends, the new electric bell as shown in the figure can be assembled. Once the power is connected, the bell will ring clearly.

6. Simple microscope

This microscope is very simple. Put two matchboxes flat on the table, and put the plastic film on the matchboxes so that the film is 15mm away from the table.

Drop a small drop of water on the plastic film, about 5 mm in diameter. Spread a piece of white paper on the table under the film and draw a tiny arrow on the paper for easy observation.

Standard. Through this water drop, you should see an enlarged arrow in the opposite direction. At this time, the distance is the most suitable.

Put the thing to be observed on white paper, and then observe the water drops with a magnifying glass. At first, you may not see anything clearly. Slowly change the height of the magnifying glass, and you will see the observed object.

1, homemade badminton

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, homemade colored candles

Materials: colored crayons, wax

Production method:

1. Find an abandoned canned beverage barrel (for example, 1.25 liter coke bottle), cut off the lid and cut the wax into the barrel.

2. Put the bucket in hot water, stir the wax inside and let it melt completely. It is best to use boiled water. But ask your parents for help, or do this step under their supervision.

3. Pour the molten liquid into a beautiful container (for example, put a heart-shaped chocolate box). Don't pour too much. As for the reason, look down. Of course, you have to put the thread as a candle core in the container first.

4. The original idea of wax cooling, A pours the melted colored crayons in according to the surface painting method (colored crayons come in handy at this time). In this way, different colors of wax are added layer by layer, and beautiful candles are made.

7. Self-made wall-mounted flower basket

Materials and tools: two sprite bottles, glue, meat cleaver, scissors.

Production method:

1. Remove the green bottom cover of Sprite bottle, cut it into lotus shape, turn it over and stick it on the bottle body to form the base.

2. Cut a 2 cm wide green ring from the green bottom sleeve and put it on the bottle.

3. Remove the bottleneck, and cut a 13cm long, 8cm wide wideband and several 3cm wide narrowband on the bottle.

4. Use a carving knife to carve patterns on 3cm narrow strips, as shown in Figure 3, and then fold these narrow strips outward and insert them into the green ring from bottom to top.

5. Take another beverage bottle, use the bottle body and cut out 6 leaves with scissors, the length is 17 cm.

6. Nail the flower basket on the wall, insert leaves and flowers, and the wall-hung flower basket will be ready.

8, homemade cockroach catching box

Take a piece of 220× 150(mm) cardboard.

The most important part of the capture box is the capture surface. Take a piece of plastic film, cut it into the same size as the bottom of the box, coat it with adhesive and spread it on the bottom of the box. Whether you can catch cockroaches depends on the adhesive. The adhesive has two functions: one is to introduce the cockroach into the box, and the other is to firmly stick the cockroach to the catching surface. Preparation of attractant: Mix 40% meat powder, 50% flour and 10% bean cake, with a total amount of about 20g, and mix well for later use. The adhesive is prepared by mixing 20g of rosin and10g of vegetable oil, heating to gel, and uniformly mixing attractant and adhesive.

Spread the prepared paste evenly on the grasping surface lined with plastic film, then fold it inward according to the original dotted line, and finally insert the tongue piece B into the notch A..

Because the mixture of rosin and vegetable oil is not dry, the viscosity of bait can be as long as one week. Put the trap box in the place where cockroaches haunt. Because the box is dark and has the bait that cockroaches like, cockroaches will climb into the box to fight for the bait and get stuck on it. When it is full, the carton can be crushed and discarded, and the plastic film can be removed and replaced with plastic film coated with bait, so that the box can be reused.

If the size of the catching box is enlarged and the composition of the adhesive is slightly adjusted, the paper mousetrap can be made by thickening the coating.

Disc pen holder

Tools: white latex, 4 CDs.

Output: 1. Glue a CD vertically to a quarter of another CD with white latex, as long as it is between the edge of the CD and the middle hole. 2. Paste it into a square like this.

Extension: If you want the bottom, you can stick a fifth disk under the box.

Usage: The pen can be inserted from anywhere.

This box is used as a CD rack.

Tools: white latex, box [as long as it is bigger than CD].

Output: 1. Subtract the side length of each box [wider than the CD]. 2. Stick them together with white latex.

Extension: 1. It can form a square or other shapes. 2. If it is too small, it will not be enough to support the CD. You can flatten the box, cut it to the size of the side of the model, and stick it on it to increase the side gravity. 3. You can also wrap a piece of Bao Shu paper outside to enhance the aesthetic feeling.

Usage: Just put it into the CD.

Roll paper core as pen container

Tools: white latex, scissors, 1 paper core, cardboard (hardness ≥ 0. 1cm).

Output: 1. Cut a piece of cardboard larger than the paper core with scissors. 2. Stick the paper core to the cardboard with white latex.

Extension: 1. A plurality of paper cores with different heights can be bonded to the cardboard side by side. 2. The paper core can be glued horizontally. 3. The paper core of single-sided glue can be stuck on the paper core placed horizontally, but a piece of paper should be stuck under the paper core of single-sided glue.