How to make innovative small inventions 1. Homemade badminton
Materials to prepare: one empty drink bottle, two foam fruit net sets, one rubber band, and one glass marble.
Production process:
1. Take a 250ml empty beverage bottle and cut off the upper part of the bottle;
2. Cut off the Divide the portion into 8 parts, use scissors to cut to the neck of the bottle, and then cut each part into a petal shape of the same size;
3. Put the foam fruit net sleeve on the outside of the bottle and use a rubber band Fix it at the mouth of the bottle;
4. Wrap another foam fruit net cover around a glass marble, insert it into the mouth of the bottle, plug it tightly and expose about 1 cm;
5. Cut half of a table tennis ball, place the bottom of the hemisphere on the mouth of the bottle, cut the four sides into whiskers, cover the mouth of the bottle and secure it with a rubber band.
6. After beautification and modification, a homemade badminton is completed. Hit it with a badminton racket and see what the effect is?
2. Homemade soap paper
Materials and tools:
White paper with good hygroscopicity, small pieces of soap, a writing brush and disposable drinks Can.
Preparation method:
First chop the soap and put it in a jar. Fill it with an appropriate amount of water and heat the cup on the stove. When the soap melts, cut out the white paper. It is about the size of a matchbox. Apply soap solution one by one, then take it out and dry it in the shade to become soap paper.
3. Homemade hot air balloon
1. First, we cut out 6 to 8 leaf-shaped pieces of paper from soft paper.
2. Fold them in half and glue their edges together to make a balloon.
3. Use tape to stick the four connecting wires to the bottom of the balloon. Use plasticine to secure the other end of the string to the table.
4. Try to adjust the speed of the hair dryer as slowly as possible. Aim the blower outlet upwards at the bottom opening and turn on the switch. The balloon will slowly grow larger, tighten the string, and lift off the table.
4. Homemade flashlight
The specific production method is: remove the lid from one end of a waste can (such as Lulu beverage can), and use a round-headed hammer to dent the other end. Use thick corrugated cardboard to roll up two AA batteries, with the positive pole facing up and the negative pole facing down, and put them into the can. Find a suitable plastic lid (such as the magic large rolled box lid that can be buckled on the Lulu beverage can), and dig a small circular hole in the center of the lid, the size of the hole is appropriate for the light bulb to be inserted tightly. Insert the bulb base into the small hole. Take a piece of hunting wire, peel off both ends of the wire, wrap one end around the lamp holder, and poke a small hole through the side of the plastic cover with the other end. Place the plastic lid on the can. Check whether the bulb and battery are in close contact. The disposable flashlight is ready here. When in use, use your thumb to press the wire coming out of the side wall onto the paint-free weld of the can, and the flashlight will shine. If your thumb leaves the wire and jumps up, the flashlight will go out. It is very convenient to use.
5. Homemade solar cooker
Find a concave reflective bowl on a large flashlight, and use rigid foam plastic or wood to cut a cylinder about 4 cm long and 1 in diameter. It should just fit tightly into the round hole of the reflective bowl. Drill a thin hole transversely at one end of the cylinder, insert an iron wire with a diameter equivalent to the diameter of the hole, and then bend the two ends of the exposed iron wire at 90°, leaving 5 cm on each side. Insert the cylinder into the round hole of the reflective bowl, and then insert both ends of the wire into a piece of foam plastic or wooden base. 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 into the other end. Place the device in the sun, with the reflective bowl facing the sun, and then patiently adjust the length of the bamboo stick so that the inserted potato is exactly at the focus of the light. Before long, the potatoes will be roasted by the sun and become fragrant.
6. Homemade colored candles
Materials: colored crayons, wax
Preparation method:
1. Find a discarded canned beverage barrel (such as a 1.25-liter Coke bottle), neatly cut off the lid, and chip the wax into the barrel.
2． Put the bucket into hot water and stir the wax inside to melt it all. It's best to use boiling water. However, you need to ask your parents for help or perform this step under their supervision.
3. Pour the melted liquid into a nice-shaped container (such as a heart-shaped frame with small pieces of chocolate). Don't pour too much. As for the reason, read on.
Of course, you first need to put the candle wick string in the container.
4. After the original wax cooled down, Ah poured the melted colored crayon liquid into it according to the method of divination (the colored crayons came in handy at this time). In this way, add different colors of wax layer by layer, and a beautiful candle is made.
7. Homemade wall-hanging flower basket
Materials and tools: two Sprite bottles, glue, carving knife, scissors.
Production method:
1. Remove the green bottom cover of a Sprite bottle, cut it into a lotus shape, flip it down and glue it to the bottle body to form a base.
2． Cut a 2cm wide green ring from the green bottom cover and still put it on the bottle.
3. Remove the neck of the bottle and cut a wide strip 13cm long and 8cm wide, and several narrow strips 3cm wide.
4. Use a carving knife to carve patterns on the 3 cm narrow strips as shown in Figure 3, then fold these narrow strips outwards and insert them into the green ring from bottom to top.
5. Take another beverage bottle, use the bottle body, and use scissors to cut out 6 17 cm long capsule leaves.
6. Nail the flower basket to the wall, insert leaves and flowers, and the wall-mounted flower basket is ready.
8. Homemade cockroach catching box
Take a piece of cardboard of 220×150 (mm).
The most important part of the capture box is the capture surface. Take a piece of plastic film, cut it to the same size as the bottom of the box, apply adhesive and spread it on the bottom of the box. The key to whether cockroaches can be caught lies in the adhesive. The adhesive has two functions: one is to introduce the cockroach into the box, and the other is to stick it firmly to the catching surface. Preparation of attractants: Mix 40% meat powder, 50% flour, and 10% bean cake. The total amount is about 20 grams. Mix well and set aside. The adhesive is a mixture of 20 grams of rosin and 10 grams of rapeseed oil. After heating to a gelatinous state, mix the attractant and adhesive and stir evenly to make an adhesive.
Evenly apply the above-mentioned paste on the catching surface lined with plastic film, then fold it inward according to the originally drawn dotted line, and finally insert the tongue piece b into the notch a. Inside.
Due to the non-drying properties of the rosin and rapeseed oil mixture, the bait can be kept sticky for up to a week. Place the trap box in a place where cockroaches are infested. Because the box is dark and contains the bait that cockroaches like, cockroaches will crawl into the box to compete for the bait and get stuck to it. After it is full, the carton can be flattened and discarded, or the plastic film can be removed and the plastic film coated with bait can be replaced so that the box can be reused.
If the size of the trap box is enlarged and the composition of the adhesive is slightly adjusted, the coating can be thickened to make a paper mousetrap
A clean mousetrap with a brush Eraser
If you write a wrong word, use an eraser. After wiping, there will always be a lot of debris left on the paper. Whether you pat it with your hands or blow it with your mouth, it is unhygienic and troublesome. Making a clean eraser won't be such a hassle.
Materials: large eraser, scrap brush.
Tools: scissors, glue.
Production method:
1. Dig a small shallow round hole at one end of the eraser 2. Remove the tip of the scrap brush, wash and dry it.
3. Cut off the tip of the brush tip to turn it into a small brush
4. Insert the tip of the brush into the small round hole of the eraser and stick it firmly with glue
Okay, the clean eraser is made. Whenever you finish wiping the eraser, you can use a brush to gently "sweep" the debris on the paper, and then pour it into the wastepaper basket.
This is very simple, the key is the idea. When I was in junior high school, I also made small productions and won the third prize. The key to this kind of production is to come up with good ideas, and production is not difficult. Let me recommend to you the small productions I made back then.
What I made is a small electronic balance model. Note that this is a model and can only weigh very light objects, such as two small scraps of paper. The materials required for production are: a piece of wood (preferably thin, not too big), a washer, paper clip, awl, soldering iron, a few wires, two light-emitting diodes, and a battery. These materials are easy to find. If you don’t have light-emitting diodes, you can go to the electronics market and buy them very cheaply.
The production process is as follows: use an awl to turn a small hole in the middle of the wooden board, bend a paper clip into a hook shape, and fix it on the wooden board through the small hole perpendicular to the wooden board. The hook can catch the washer. Can.
Then take two paper clips and straighten half of them, leaving only one bend. In fact, the straightened part is the arm of the balance, and the remaining bent part is the tray. Do the same with the other paperclip. Then weld the two paper clips and the washer together, with the washer in the middle and the paper clips in a straight line. Then hang the washer on the hook and adjust the distance between the hook and the board to about 3mm. Then fix two paper clips under the two trays, and prepare LEDs as indicator lights next to the paper clips. With the circuit set up under the board, the balance acts like a single-pole double-throw switch. This circuit is equivalent to two loops, using only one power supply and two light-emitting diodes. As long as the left side sinks, the left tray will be connected to the pin below it, so that the circuit is connected and the diode lights up; if the weight on both sides is equal, the circuit is blocked and both diodes do not light up.