I want to invent XX essay for elementary school students

I want to invent a book that is only four pages. The book is the same size as the language book, with a universal pen and an eraser on the cover. This eraser can be wiped clean with whatever pen you write it on; There is a pen adjustment table on the marker.

For example, if you want to use a fountain pen, after entering the command, the universal pen becomes a fountain pen.

Books can only be opened with the fingerprints of the teacher and the person who owns the book. If someone wants to steal a book, the book will automatically sound an alarm.

The first page is the text area. As soon as you say the number of texts in which edition of the grade grade, it will automatically appear (including materials and **).

The second page is the deformed area. If you want to record a video, write on the video recorder and the book will immediately become a video recorder. If the recording is finished, say restore, and the VCR will change its face.

The third page is the exam preparation area. For example, if you want to do a question, press the exam button, and it will come out with the exam question you want to do. After the exam, if you make a mistake, it will explain to you little by little until you can.

The fourth page is the area of good words, good sentences, good paragraphs, and good articles. There are four keys on this page, which are the ones above. In this way, it is much more convenient to think of good words, good sentences, good paragraphs, and good articles.

In the future, with this book, I only need to take a book with only four pages to go to school, and I don't have to carry a large and heavy school bag, which is really convenient.

That ......And one more.

I wanted to invent a blackboard, which is not an ordinary blackboard, and this is for all the students.

I want to invent this kind of blackboard looks no different from the ordinary blackboard, but it has many uses, the first function is to automatically erase the blackboard, if a blackboard can automatically erase the blackboard, it can save a lot of time to lecture, because the teacher will definitely wipe the blackboard after a question, the teacher will waste a lot of time to wipe the blackboard, but the gangster will automatically wipe it in two or three seconds to wipe it is finished. The second function is to automatically clean the blackboard, when the teacher finishes the class, there is always a lot of chalk ash on the blackboard, if the blackboard will be automatically cleaned, there is no need for the students to wipe it slowly, and then the blackboard will be automatically dried, so there is no need for the teacher in the next class to wait for the blackboard to dry before writing, which also wastes a lot of time. The last function is to automatically clean the chalk ash, when the teacher writes on the blackboard, the chalk will fall a lot of chalk ash, if the blackboard can be automatically cleaned, then there is no need to let the students on duty worry about chalk ash under the blackboard.

That's what I wanted to invent a chalkboard.

In daily study, work and life, everyone will inevitably come into contact with composition, and the composition must be focused on the theme, and the same theme should be elaborated in depth. Do you know how to write a good essay? The following is my invention primary school essay that I have compiled for your reference, hoping to help friends in need.

In the near future, I became a great inventor.

One day, I went to my institute with my backpack on my backpack as usual. On the road, there was a traffic jam, and I was locked in the car, which was already stuffy, but I was so out of breath from the exhaust of the car that I almost threw up. I finally got to the research institute, and I caught up with the power outage, alas!

It's bad luck. I had a whim: I wanted to invent a "solar compression collector" that would replace gasoline and electricity with solar energy.

I found materials that can withstand high temperatures and did countless experiments, but they all failed. I remember one time, when I was experimenting, I was burned by the huge energy that came from the focus. After that accident, I was disheartened, so I didn't go to the institute for several days.

After a few days, I was still unwilling, I thought that the hard work paid off, I continued to muster up the courage to do repeated experiments, and finally my invention solar compression collector was born.

Don't look at my "Solar Compressor" black face, there are only two buttons on the black face, red and green, but it's very useful. This "solar compression collector" is only the size of the palm of your hand, and its shell is specially made, no matter how large the amount of solar energy is stored, it will not generate heat, but its shell temperature will also change with the ambient temperature. The green button on the collector is to start the acquisition, and the red button is to stop the acquisition.

If there is a power outage, this solar collector is shone in the sun to collect solar energy, and for a minute, it will have 400,000 watts of electricity in it. It has a magnetism function on its body, and if you pull it on the socket, you can start supplying power. In the same way, collecting solar energy and sucking it into any of the hidden parts of the car with magnets can make the car start without gasoline, even if there is no sun.

It can also harvest the energy of lightning, electricity, and air currents.

I filed a patent for my invention. Promote it outward. Because this kind of collector is environmentally friendly and energy-saving, it has been widely favored.

One day I received an email saying that I had won a Nobel Prize for my "solar compression collector".