My invention composition 400 words fourth grade Volume II (personal collection)

1: my invention composition 400 words Grade 4 Volume 2 In the future, I will become an environmental protection expert, because I invented an environmental protection robot animal-an environmental protection clean bird.

The classic environmental bird has bright green "skin", a head about the size of a wild goose and wings like wings. It can fly, go into the water and walk on land.

Its "work" has a wide range. The first function is to remove garbage. On land, as long as you see a little garbage, the vacuum tube will automatically eat the garbage into your stomach, and it will become fertilizer immediately after the processing and chemical action of the robot stomach, and then the environmentally-friendly clean bird will fly to farmland, flowers or forests and throw the fertilizer down.

The second function of environmental protection clean birds is to purify the air. It will sniff out the polluted air with its sensitive "nose" and suck it into its stomach. After filtration and chemical reaction through the filter tube, it becomes fresh air and is discharged again.

The third function of environmental protection clean bird is to purify water. As soon as its eyes with microscope function find that the water in the river is polluted, they will taste it themselves and automatically calculate the pollution degree of the effluent. According to the data processing, the environmentally-friendly clean bird will release a corresponding amount of "river water purification liquid", and the water quality will become crystal clear after one or two days.

I invented the "environmental clean bird". Do you think it's amazing?

Article 2: My Invention Composition, Volume 2, Grade 4, 400 words I want to invent a special new type of "toothpaste".

The shape of this new toothpaste is similar to that of ordinary toothpaste. It is very small. There is a black screen on the lid and three small wheels on the bottom to prevent this new toothpaste from breaking. There is also a handle on the top of the new toothpaste, with a red button, a yellow button and a green button on the front.

This new type of toothpaste is not used to hold toothpaste, but greatly saves space. For example, if you travel far away, there will be a lot of luggage. At this time, press the red button on the front of the new toothpaste, and the lid of the new toothpaste will open. If you press the green button again, all the luggage you need will be sucked in. Then tighten the lid, and you can take the "toothpaste" on the road. Besides, when you get to the hotel and want to drink water, just press the red button, let the lid open and say, "I want a kettle." Soon, the kettle "came out" from the new toothpaste. If thieves come to steal, I also have a set of methods. When a thief enters your room and gets a new toothpaste, the new toothpaste will say, "Please check your fingerprints, please check your fingerprints." The thief will be drugged as soon as he touches the screen. The next morning, when you wake up, you will be surprised to see the thief. At this time, the new toothpaste will stretch out a robot finger from the handle and say, "He is a thief, he is a thief." At this time, you ask the public security bureau to arrest the thief, and then press the yellow button safely to let the thief wake up in prison.

In order to invent this amazing new toothpaste, I study hard now, and maybe I can invent something better than this new toothpaste in the future.

Article 3: My invention composition is 400 words. Dad, I have arrived at school! "At this time, you may wonder why primary school students have mobile phones. Oh, I forgot to tell you, this is the pencil case in the super stationery I invented.

This pencil box is different from other pencil boxes. There is a small box on the upper right. This small box is a microcomputer, which can store text information. Words that can't be written will appear as long as they are lightly touched. What's even more amazing is that you can make a phone call. Just say the phone number and it will become a videophone. Open the pencil case, which contains all kinds of stationery with their own characteristics.

As far as mechanical pencil is concerned, no matter how many refills you use, it can still be sent out because it has the ability to make its own refills; Except for the pen, it always seems to have endless ink; The ruler is even more remarkable, although it is only 20 cm long in the pencil case. If you want to extend it, it can reach 50 cm, which is long enough. There is also a ballpoint pen, with two small lights on both sides, which can help you with your homework even at night when there is a power outage; Finally, the eraser, ordinary eraser can only erase pencil words, but also erase ink such as pens and ballpoint pens.

This is super stationery I invented, not bad!

Article 4: my invention composition, volume 2, grade four, 400 words. Everyone has a great dream, and I am not among them. I want to invent an intelligent desk, because the current desk is big and heavy, which is inconvenient to use, and it will be very hot in summer and very cold in winter.

It looks like an ordinary desk, with various colors, which can change with your mood. When you are angry, as long as you pat it, the color will become lighter; When you are in a good mood, it will become a seven-color rainbow as long as you pat it. It can be folded to save space. It can also automatically adjust the temperature. When summer comes, the weather becomes very hot. You just need to press the blue button in the upper left corner of the desk, and two fans will automatically turn out on both sides of the desk, so that you can enjoy the cool while attending class. When the weather is cold in winter, just press the red button in the upper right corner of the table, and the table will automatically become the heat needed by the human body. Don't think it's over, it still has many skills. When you press the white button in the lower left corner of the desk, the desktop will become a computer display screen, and the desk drawer will automatically become a computer keyboard, and it is powered by solar energy. Environmental protection and convenience. Press the black button in the lower right corner, and the table will become a simple and comfortable little sofa, which is convenient for use during recess.

I hope that in the future world, the dream of this smart desk can be recognized and widely used by everyone. This is my dream.

Article 5: My Invention Composition 400 words Grade Four Volume II If you want to have your own unique personality, try my new invention-personalized candy!

In order to debug the character candy, I traveled all over the world, bought many samples, let the robot Xiaoli collect light in the sun, and also collected a tear shed by the little boy because he trampled the ant to death.

I poured this tear into the lamb model, and then added light, which immediately lit up. Put the mixture in the refrigerator, take it out later, and then take out the spare moon shadow candy-as the name implies, it is made of the shadow of the moon-and sprinkle it on this candy.

The color of personalized candy gradually changes with the orange of the sun as the main tone. The moon shadow candy on it exudes attractive luster, giving people an optimistic, cheerful and positive feeling. No wonder swallowing it will make you kind! I made a lot of personalized candy-blue pigeon candy represents silence, and red sun candy represents enthusiasm. ...

Look, a poor stray cat came running, and the person who ate the kind candy immediately picked it up with heartache and sent it home.

I won't tell you more, I want to produce more personality candy! If you want to have a unique personality, come to me to buy personalized candy!

Chapter 6: My Invention Composition Book 2, Grade 4 400 Words With the growth of age, we need to learn more and more knowledge. Although the teaching materials are constantly updated, they still can't meet our demand for knowledge, so I decided to invent a multifunctional electronic teaching material.

This multifunctional electronic textbook is made of cosmic crystals. It is 20 cm long, 30 cm wide and weighs about 75 kg. The original new LCD screen can not only protect eyesight, but also relieve study fatigue. High-performance super battery can be used for one year on a single charge. How's it going? Are you eager to know its other functions?

Electronic textbooks store all the knowledge from the first grade of primary school to the university. If you accidentally drop your textbook in class, please don't worry that the noise will disturb the teachers and other students. Although this cosmic crystal is hard, it is a light material, and only emits 1 decibel sound. If there is anything wrong with the homework assigned by the teacher after school, it will give you appropriate hints to finish it quickly. When you make a mistake, it will show a red cross; When your topic is done correctly, a green tick will appear; If the topic is omitted, a yellow circle and a question mark will be displayed next to it. If you still can't do it after being prompted, you can consult other students online. Of course, if you use this to "consult" others during the exam, I'm sorry, I'll disqualify you.

Paper textbooks are updated every few years, but the advantage of electronic textbooks is that they are automatically updated and all the data of previous textbooks are saved.

Electronic teaching materials can also make you relax after studying. When you are bored, you can click related operations with the matching electronic alloy pen, such as clicking the "doodle" button to draw, clicking the "joke" button to listen to jokes, and clicking the "cartoon" button to watch cartoons ... Of course, this button will automatically "lock" during classes and exams. If you can't find the information, you can click the "Search" button and say the key words of the information. Of course, this exam will also be automatically "locked".

In addition, it also has the most peculiar function, that is, the protection function. There is an invisible button in the lower right corner of the electronic textbook. Invisible button has two functions: alarm and invisibility. If you accidentally meet a bad guy, just touch the invisible button quietly, and the electronic textbook can call the police directly, and it can also make you "automatically invisible" when the police don't appear. How, is this function powerful enough?

Students, what do you think of my invention? I look forward to your valuable comments. Your suggestion will make my invention more perfect and scientific. Thank you!