In study, work, and life, it is inevitable for everyone to come into contact with composition. Composition is a verbal activity in which people express their feelings in written form. What kind of composition can be called an excellent composition? Below is the fourth-grade composition of invention primary school that I compiled for you. It is for reference only. I hope it can help you. Invention Primary School Fourth Grade Composition 1
This morning, I was doing homework at home and made a few mistakes. I picked up the eraser and erased it, leaving a lot of dirty things on the homework book. What do I want to do with it? Where are these rubber scraps? So I suddenly wanted to invent a small invention for dealing with rubber scraps.
But what kind of things should be made to deal with these rubber scraps? I lay on the table and thought about it, but I couldn't remember anything. I paced back and forth in the room, thinking about it. At this time, I saw the broom and dustpan placed in the corner. They can clean things on the floor. Clean, I can make a "clean eraser" after them.
How to do it? I continued to think, and suddenly, I had an idea and came up with a good idea. My idea is to add a broken-end scrap brush to one end of the eraser, so that after rubbing with the eraser and then sweeping with the brush, there will be no eraser shavings.
The production began. I first dug a hole at one end of the rubber, not too deep or too shallow. Next, put the brush into the hole, and then use glue to secure the brush. If you are still afraid of cracks in the eraser, just use transparent glue to glue it on a few more times, and you will have a compact, convenient and practical clean eraser. Just let it dry and it's ready to go.
A clean eraser can erase typefaces without leaving any eraser foam behind. It really serves multiple purposes.
How is it? Is the clean eraser I invented good? It seems that as long as we are willing to use our brains and have the courage to practice, each of us will create something. Invention Primary School Fourth Grade Composition 2
In our rural area, the environment is the best. Everyone says that the rural environment is much better than the environment in the city. But I recently discovered that the environment here is not as good as before, and it is getting worse day by day. At this time, an idea came to my mind - if I were an inventor.
If I were an inventor, my first invention must be good for the environment. If I were really an inventor, I would definitely invent a machine shaped like a human mouth, only several times larger than our ordinary mouths. A penis has two mouths, one smaller and one larger. There is a red button next to the small mouth and a blue button next to the large mouth. This machine can be used in two ways. Type 1: If there is a book that you don’t want to use anymore, just put it in your mouth and press the blue button next to it, and it will be gone; Type 2: If you can’t use the pen anymore and want to throw it away . Just put it into the little mouth and press the red button next to it. In less than ten seconds, it turns the pen you just put in into the same pen you originally bought and wants to spit it out from its small mouth. This way, the pen can be used again. This machine does not need to be plugged in, it uses ordinary batteries. Only one battery is enough for a machine. One battery should last about a year. If you put something in it that you shouldn't or accidentally, it will say from the mouth: "Danger! Danger! Danger..." until someone notices it. This machine will be placed in every school and one in every public place.
If I really become an inventor and really invent this machine. The world will definitely become a better place! Invention Primary School Fourth Grade Composition 3
How great it would be if I were an inventor!
If I were an inventor, I would invent a trash can with unlimited garbage. That is to say, this trash can is not full. If you accidentally throw away something valuable as trash, there is a button next to the trash can. You just need to enter the thing you want to find and press the confirm button. After a second, what you're looking for will fall out from underneath.
If I were an inventor, I would invent a spaceship that belongs to the earth. In this way, which planet we want to go to, we can just enter the name of that planet in the spacecraft, and in two seconds, we will be there. Going to the planet.
If I were an inventor, I would invent a futuristic device. This invention can know the future in advance. If an earthquake is going to happen later, no one will know. Just enter the input into the futuristic device. Soon, people will know that an earthquake will occur soon and take precautions in advance.
If I were an inventor, I would invent more and better things. Invention Primary School Fourth Grade Composition 4
Today, when our teacher was talking about creative rights, he mentioned that Tsinghua University recruits people with patents and strong imaginations. How I want to go there! Suddenly, I had an idea and thought: 'Why don't I modify something myself? ”
When I got home, I thought for a while and came up with the idea of ??assembling the bottle with the pencil case. In this way, the bottle is not wasted and the small bottle can be carried easily. It can also be put on a strap. It can be worn on the hand, how nice it is!
Just do it, I immediately went to the basement, took a bottle of potato chips and a broken pencil bag, and announced: "Officially started! "I immediately came to the study room. I first used scissors to cut off a small strip of cloth from the broken pencil bag, and stuck it in the bottle with strong glue. When I saw it, ha! Each hole can fit a pencil exactly. It suits me. So I started the second step?
This step is quite simple. I took a piece of foam, cut it into a circle, and then cut out a square from the middle. Stuff it at the bottom of the bottle, and finally stuff it with a big piece of rubber, and it's OK.
After a long period of hard work, I finally made my first work, but I couldn't see it from left to right. I thought it looked good, so I had to put it in the basement.
Although I failed this time, I believe that I will succeed next time! Because there is a saying that "Nothing is difficult in the world, only "I'm afraid of someone who is thoughtful"! Invention Composition 5 for Grade 4
If I were an inventor, I would invent a folding house that looks like a piece of paper when it is not opened and can be taken with me at any time.
I also want to invent a time shuttle. It is like a door. You only need to set the time and place, and then walk in and come out through another door with the set time and place.
I also want to invent a foldable computer. It is originally a small ring-shaped switch. You just need to press its diamond to turn it into a highly intelligent laptop.
I also want to invent a foldable computer. It is necessary to invent a highly intelligent robot. This kind of robot is different from ordinary robots. This kind of robot will do whatever you say. As long as you say the exact password and add the name of the robot, it will do it, and it will do things and understand The ability is particularly strong.
I will also invent a super glove. It is made of a rare material and your hands will not be hurt when you wear it. It can also be completely integrated with your hands as long as you shout. Say "take off" and it will immediately take off and turn back into a pair of ordinary gloves.
I will also invent genetically modified beans. If you want to see a real Tyrannosaurus rex, you just need to write on a piece of paper " "Tyrannosaurus Rex", and then put it into the gap of the gene bean, the paper will merge into the bean, and then feed it to any animal, that animal will become the animal written on the paper.
I will also invent a massage bed. As long as you lie on it, the bed will know where you are uncomfortable and massage it for you.
I will also invent a treasure hunter. As long as you tell what you have lost, It will help you find it.
I will also invent many, many things, such as versatile clothes, Superman capes, and recycled chocolate.