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Small invention

I'm a little girl who loves to create. But all I do are paper gadgets. This time, I decided to make a scientific invention. What should I do? Oh, I can make a small light bulb! Because I like the faint light of candles, but there is a bad smell when I light a candle. I can use a small light bulb instead of it.

First of all, I need a miniature light bulb that can emit orange light, a No.1 battery, a wire with copper wire inside, a small candle and a beautiful piece of paper. The first three items should be bought by mom. What about the last two? I have to prepare it myself. Small piece of candle I burn a candle and drop the wax oil into a round box with toothpicks. When it's dry, take it out and cut a centimeter thick piece of candle. It's not easy to do this job. I cut it several times and failed. When I was about to give up, I suddenly got inspiration and everything was cut. Beautiful small pieces of paper are easy to handle. Just find a hard card and cut off some of it.

When all the materials are found, I will start to work. First, cut the wire in half and pull out the wires at both ends. Tie the little light bulb to it and wind the other end around. Then install the battery, and finally stick the candle piece with transparent glue, and stick the battery firmly. It seems easy to do, but I always can't stick it on, so I had to use 502 to stick them on. The small light bulb finally lights up. If it doesn't light up, just jam it with a small piece of paper.

Looking at the tiny warm light of his little invention. My heart is more sweet than honey! When I want to take a bath, there is a lot of water in the bucket. It's very difficult to lift it, so I want to invent a small cart. The materials needed for the small cart are a screwdriver, sixteen screws, four wheels and a flower board.

First of all, my father and I went to buy materials. Then we drilled 16 small holes in the flower and wood board, fixed the four wheels, and finally tightened the screws. In this way, the small cart is ready.

I took my little cart and tried it. Gee! Why can't I pull the cart? I checked, oh! So I locked the wheel. I immediately opened the lock. I tried again. The bucket was easily pulled on the trolley.

I think I'm very happy to have invented the red flag at last. I want to have a small invention. I want to have a small invention buried in my heart. If the blackboard is dirty, you don't have to clean it by pressing the button. Teacher is the hardest person. My invention is dedicated to you to save your energy. I want to have a small invention buried in my heart for a long time. If you have wrinkles, you don't have to worry about using it. Old teacher is the hardest person. My invention is dedicated to you to make you young. My small invention whenever I go to school At school and after school, I would look in the window at the little invention I made in my fourth grade summer vacation -- wind chime.

It was the summer vacation of the fourth grade. I had finished a lot of my homework. Only the small production was a headache for me. Once, I happened to see a box of expired "Sanjing brand blue bottle oral liquid" in the living room. I curiously walked over and opened it. It was full and I only drank one bottle! I look at these good oral liquid, want to drink, but it has expired. It's a pity to throw it away. What should we do? I have an idea: 'I can pour out the expired oral liquid in the bottle and collect the bottles outside to make a beautiful wind chime! '。

When I finished, I took out all the liquid from the mouth of the bottle and put it on the table. From home, I found some paper cards and double-sided adhesive tape that I didn't use up in art class before, and also found wool, scissors and other tools. When everything is ready, the production will begin.

Many wind chimes that I have seen in the shop flash in my mind, but I don't know what to do. I found a lot of art books, and finally found the 'underwater world' wind chime in the third grade art books. After a long discussion with my mother, I decided to do it. composition

First, I used a piece of blue cardboard to cut it into a circle, then cut off an acute angle on the circle, and then glued the two sides of the angle just cut off with double-sided adhesive, thus forming a funnel shape. Next, we're going to make a pendant. Pendants are all kinds of sea creatures. I drew a big crab on a piece of red cardboard, holding big and powerful feet and bulging a pair of big eyes! I cut it carefully with scissors. Then cut a big fat carp, a small turtle with a thick shell & hellip; & hellip; and prepare some wool of different colors, one on the back of each creature. The second is to hang a bottle under each creature. How can I hang the bottle stably? It's not good to put it directly on the bottle mouth, but the bottle is made of glass, and you can't make a small hole under it. What should you do? I looked at the bottle in a daze. All of a sudden, my eyes fell on the toothpick on the table. I had an idea. I divided the toothpick into two sections, picked up one section, tied it with wool from the middle, and then put the toothpick obliquely into the bottle mouth to lift the wool. The bottle was lifted steadily. I use the same method to change the content of this page from "read. 4" HW.com.cn ”Some bottles are hoisted for you. Finally, thread all the wool connecting the creature and bottle through the center of the funnel and twist it into a strand. Such a beautiful wind chime is ready. I happily showed it to my mother. My mother also liked it very much. She praised me for my good work and hung it in the living room with me.

Every time I go to the living room, I look at my wind chime. Every time the wind blows, my wind chime will sing and dance in the wind. composition

Central primary school five small inventions, so I want to invent a kind of garbage can - environmental protection garbage can. When people throw the garbage can, it's very simple: "don't hesitate to see the name of the garbage can." If the person walks away, the garbage can will reach out and put the garbage into his mouth. I know that buildings are being lifted in some places now. Workers have to use machines to lift buildings, so they will make a kind of "noise". Every time people pass through these places, they have to cover their ears and leave as soon as possible. Otherwise, listening to this sound for a long time will do harm to human body. Therefore, a music sensor should be installed in the garbage can. Whenever "noise" is emitted, a kind of wonderful music will be emitted, so that workers will no longer be harmed by "noise" every day, and they can work at ease and revel in the wonderful music every day.

I am thinking, whenever people walk by, they will praise "this is really an extraordinary heart!" Not long ago, an International Conference on emission reduction was held in Copenhagen. I believe everyone has seen the movie 2013! We can imagine why the earth has such a bad change? All of these are directly related to excessive carbon dioxide emissions. One of the emission channels of carbon dioxide is automobile exhaust. What a pollution this has caused! Because most cars now burn gasoline, a few gas and a few electricity. In order to generate electricity, a large number of coal mines are mined, which not only causes energy loss, but also may cause dangerous water flooding accident in Wangjialing coal mine. Therefore, environmental protection is too important. For the future of the earth and mankind, I think of how to save energy and protect the environment.

You must know wind power! You can't open the window when the car is moving and moving very fast. Why? Because the air flow too fast, resulting in strong winds, people will feel cold. If the wind is used and used to generate electricity, it should be enough for the normal operation of a car! So, I thought of making many very, very strong aluminum windmills, which are installed on the top of the car. When there is wind, the windmill will naturally turn, and the greater the wind is, the faster the speed is, the more electricity will be generated. The windmill is connected with a small generator. When the windmill rotates, it generates kinetic energy. The generator will convert it into electrical energy and output it to the car. Then the car can be started, and a storage battery will store the excess electricity. When the engine runs at high speed, the kinetic energy produced by the windmill will be converted into electrical energy and stored to replenish the car's electricity, thus recycling 。 In this way, the wind energy is utilized, and the waste gas is not emitted, so as to achieve the effect of energy conservation and emission reduction and natural environment protection.

Well, that's a good idea! I really hope that this day can come early, for the sake of environmental protection, for the sake of protecting the earth and human beings.

Composition of class 5, grade 6

Lin Yuntao, my little invention. I want to invent miniature house most.

Because in our life there are many people are alone, when going out for a long time, always can't let go. The miniature house will solve this problem for you.

The miniature house is a model house. It's very small, only a quarter the size of one palm. It's very simple to use. It takes up very little space. You don't have to worry about it missing, because if you lose it, it will send out an abnormal fluctuation, which only the owner of the small house can hear and see. If someone picks it up, wants to own it, and breaks the instrument that sends the fluctuation, there is no need to be afraid, because the miniature house can only be opened by its own remote control. Other remote controls can't be turned on. I hope this kind of house will bring you convenience. The miniature house has a remote control. There are seven keys on the remote control. The colors of the keys are different: red, yellow, blue, green, green, red and purple. The seven buttons are: carbon dioxide absorption, lights on, lights off, warm, cool, networking, protective cover. People can surf the Internet, watch TV and so on. This kind of use is very extensive. It is especially suitable for explorers who often go out. Where do some people in the house come from? If an explorer climbs up a cliff, how can the house be set down? What if an area is hot or cold? How to get online without cable? What if wild animals come in the mountains? Don't be afraid of these problems. Because the mysterious remote control is in your hand, you just need to press the red key in the remote control, and the house can save energy for itself. The main energy of the house is carbon dioxide. So you don't have to waste so much energy. As long as you press the yellow key, the light will turn on automatically, but the lights in other places will not turn on except your room. As long as you press the blue key, the light will turn off. As long as you press the green button, the house will automatically warm up, so that you don't have to suffer from severe cold when you go out in winter. As long as you press the green button, the house will become very cool, so that you no longer have to face the heat in summer. As long as you press the red key, the computer will automatically connect with the telecom. As long as you press the purple button, there will be a transparent protective cover next to your house to protect you from the worry of wild animals. Even though it's just for me