If you make a mistake, use an eraser. After wiping, there will always be a lot of debris left on the paper. It is unsanitary and troublesome to pat by hand or blow by mouth. It won't be so troublesome to make a clean eraser.
Material: large rubber, waste brush.
Tools: scissors, glue.
Production method:
1. Dig a small and shallow round hole at one end of the rubber. 2. Remove the tip of the waste brush, clean it and dry it.
3. Cut off the tip of the brush head to make it a small brush.
4. Insert the brush head into the small round hole of rubber and stick it firmly with glue.
Ok, the clean eraser is ready. Whenever you finish wiping the eraser, you can gently "sweep" the crumbs off the paper with a brush and then pour them into the wastebasket.
This is very simple, the key is thinking. I also made a small production in junior high school and won the third prize. The key to this kind of production is to come up with good ideas, and the production is not difficult. Let me recommend my little production to you.
I made a small electronic balance model. Note that this is a model, which can only weigh very light objects, such as two small pieces of paper. The materials needed for production are: a wooden board (preferably thinner, not too big), a washer, a paper clip, an awl, an electric soldering iron, several wires, two light-emitting diodes and a battery. These materials are easy to find. If there is no led, you can go to the electronic market to buy it. They are very cheap.
The manufacturing process is as follows: drill a small hole in the middle of the board with an awl, bend a paper clip into a hook shape and fix it on the board through the small hole perpendicular to the board, as long as the washer can be hung on the hook. Then take two paper clips and straighten them in half, leaving only one corner. In fact, the straight part is the arm of the balance, and the remaining curved part is the tray. Another paper clip does the same thing. Then use the middle washer to weld the two paper clips together, and the paper clips should be in a straight line. Then hang the washer on the hook, adjust the distance between the hook and the board, about 3 mm, then fix two paper clips under the two trays, and prepare led as the indicator light next to the paper clips. A circuit is arranged under the board, and the balance is equivalent to a single-pole double-throw switch. This circuit is equivalent to two loops, using a power supply and two light emitting diodes. As long as the left side sinks, the tray on the left side will be connected with the pin below him, so that the circuit will be connected and the diode will emit light; If the two sides are equal in weight, the circuit is blocked and both diodes are not lit.
This is my design idea, welcome to refer to it. If you have any questions, I can continue to help you Good luck.
The new invention method 1, self-made badminton
Preparation materials: an empty beverage bottle, two foam fruit nets, a rubber band and a glass ball.
Production process:
1. Take an empty 250ml beverage bottle and cut off the upper part of the bottle body;
2. Divide the cut part into 8 parts, cut it to the bottleneck with scissors, and then cut each part into a petal shape with the same size;
3. Cover the foam fruit net outside the bottle and fix it at the mouth of the bottle with a rubber band;
4. Wrap a glass marble with another foam fruit net and plug it into the bottle mouth until it is exposed about1cm;
5. Cut off half a table tennis ball, cover the bottom of the hemisphere on the bottle mouth, cut the four sides into whiskers, cover the bottle mouth and fix it with rubber bands.
6. After beautification, a homemade badminton is finished. Hit a dozen with a badminton racket and see how it works.
2, homemade soap paper
Production materials and tools:
White paper with good water absorption, small pieces of soap, writing brush and disposable beverage cans.
Production method:
Chop up the soap first, put it in a jar, put a proper amount of water in it, heat the cup on the stove, and when the soap melts, cut the white paper into the size of a matchbox, coat it with soap one by one, then take it out and dry it in the shade, and you can make soap paper.
3. homemade hot air balloon
1. First, we cut 6-8 leaflike pieces of paper from soft paper.
2. Fold them in half and stick the edges together to make a balloon.
3. Stick the four connecting wires to the bottom of the balloon with adhesive tape. Fix the other end of the line on the table with plasticine.
Try to set the speed of the hair dryer very slowly. Aim the air outlet upward at the opening at the bottom, and then turn on the switch. The balloon will gradually get bigger, tighten the line and leave the table.
4, homemade flashlight
The specific manufacturing method is: lift one end of an abandoned can (such as Lulu beverage can) and beat the other end with a round hammer. Roll up two 1 batteries with thick corrugated cardboard and put them in a can, with the positive pole facing up and the negative pole facing down. Find a suitable plastic lid (for example, the magically rolled lid can just be buckled on Lulu's beverage can), and dig a small round hole in the center of the lid ... >>
Question 2: What are the gizmos in life? The small scale said that a stick, two ropes, two eight-treasure porridge bottles, moon cake boxes, anything can be made more exquisite.
Question 3: What are the small inventions and productions about electricity? I suggest buying a book written by Zhang Xiaodong. There are some simple small productions, and only a few small originals can make economical and practical gadgets. I benefited a lot from it! ! !
catalogue
1 week (February 28-20, 20091June 3, 0)
Talking greeting card
Week 2 (20 10 65438+10.4-65438+/kloc-0.0/0)
Talking gift box
Week 3 (65438+ 10 in 20 10/1l7 in 0/0).
Welcome voice doorbell
Week 4 (20 10 65438+ 10 month 18-65438+ 10 24 October)
Flash plastic potted flowers
Week 5 (2010 65438+125 October-65438+13 October/0/)
Music lantern chain
Week 6 (2010 February1-7 February)
There are lanterns in Cambodia. "
Week 7 (February 8, 2065438+00-February 2065438 +04)
Interesting electronic "firecrackers"
Week 8 (20 10 February 15- February 2 1)
Light gun shooting "tiger" toy
Week 9 (February 22, 1965 to February 28, 1965, 438+00)
Children's musical lanterns
Week 10 (March 7, 1965)
hearing-aid
The first 1 1 week (20 10 March 8-March 14)
Two-color electronic corsage
Week 12 (March 20 15 to March 20 10)
Edible oil adulteration detector
Week 13 (20 10 from March 22nd to March 28th)
"Raindrop Sound" hypnotic device
Week 14 (20 10 from March 29th to April 4th)
Voice control simulation of "bird"
Week 15 (201April 5-201April/year)
Small disinfectant generator
Week 16 (April 20 10/2, April 20 10/8)
Solar garden lamp
Week 17 (20 days, April 9-April 25, 0)
Reading memory device
Week 18 (20 10 April 26th to May 2nd)
"Wedge" door alarm
Week 19 (20 10, 9 May)
Infant urine alarm
Week 20 (20 10 May 10 -06 May 65438)
Earthquake audible and visual alarm
2nd1week (20 10 May 65438+7 to May 23rd)
Voice doorbell with flash
Week 22 (May 24th to May 30th, 2010)
Voice alarm ashtray
Week 23 (2010May 31-June 6)
Interesting "ring" game device
Week 24 (20 10 June 7-June 65438, 2003)
Solar fan cool hat
25th week (20 10/June 01April-June 20)
Human fatigue tester
26th week (June +00, 2065438, June +0-June 27, 2065438)
Food spoilage detector
Week 27 (June 438, 1965+July 4, 2000)
Calm "cricket"
Week 28 (20 10 July 5-July 1 1)
A miniature ceiling fan delay switch,
29th week (July 10, 2012-July 18)
Watermelon ripening agent
Week 30 (20 10 July 65438+July 25, 2009)
Automatic controller of electric water heater
3rd1week (20 10 July 26th-August 60th)
Talking toy gun
Week 32 (August 2, 2065, 438+August 8, 00)
Overvoltage protection socket
Week 33 (August 9, 2065438 +00, August 5, 2065438)
"Little Pig" who can record and play.
Week 34 (from August 6, 1965 to August 22, 1965, 438+00)
Potted flower water shortage alarm
Week 35 (August 23-August 29, 20 1O)
Dawn crows "golden rooster"
Week 36 (August 30th to September 5th, 2065438 +0D)
Multifunctional clock-controlled voice prompter
Week 37 (September 6th, 2D1D-September 12)
A meaningful "candle"
Week 38 (20 10 September 13- September 19)
Meditator
Week 39 (20 September to 26 September, 1965, 438+00)
Help package for patients with coronary heart disease
Week 40 (September 27th, 2065 438+00-ID 3)
Wonderful color-changing optical fiber "flower"
Week 4 (June 4th, 20 10, 10, jO Day)
Photometric pencil case
42nd week (20 10, 10,1-10, 17)
Multi-purpose alarm walking stick for the elderly
43rd week (20 10 year, 10 month, 18 days-10 month, 24 days).
Delayed night light
Week 44 (20 10, 10, 25th-10, 3 1)
Talking "Golden Pig" piggy bank
The 45th week (2010 1 10/0/0/0/0/0/0).
Electric blanket broken line detector
Week 46th (2010165438+1October 8th-1... > >
Question 4: Do you have any inventions or productions? Choose one you like best and introduce it to everyone! Yes, my X6 wiper is broken. I bought another one from Taobao and installed it myself.
Question 5: Simple and interesting small production/invention 5 points: Clean the eraser with a brush: If you make a mistake, use an eraser. After wiping, there will always be a lot of debris left on the paper. It is unsanitary and troublesome to pat by hand or blow by mouth. It won't be so troublesome to make a clean eraser. Material: large rubber, waste brush. Tools: scissors, glue. Manufacturing method: 1. Dig a shallow round hole at one end of the eraser. 2. Remove the tip of the waste brush, clean it and dry it. 3. Cut off the tip of the brush head and turn it into a small brush. 4. Insert the brush head into the small round hole of the rubber and stick it firmly with glue to make a clean eraser. Whenever you finish wiping the eraser, you can gently "sweep" the crumbs off the paper with a brush and then pour them into the wastebasket.
Question 6: Ladies and gentlemen, let me know if you have any small inventions. An old cock who can fight is anxious.
This is a simple toy made by magnetic principle.
Supplies required:
Small iron sheet, cardboard, scissors, bar magnet, glass plate (or cardboard)
Production method:
1. Draw two cocks with cardboard and cut them with scissors.
2. Cut two small pieces of iron into an arc-shaped pry plate and fix the rooster on the arc-shaped pry plate.
3. Find a bar magnet, put the rooster on the glass plate (or cardboard) and slide the magnet left and right. Because of the magnetic effect, cocks fight.
Question 7: Pay attention to your surroundings, use your little brain, and write down your small inventions and small production processes. Now the science and technology small production is related to Otawa physics, and it is better to bring some electrons. If you need related production, you can go to Shell Technology, and there are many small technological productions on the tall side.
Question 8: Are there any technological gizmos suitable for primary school students? Scientific invention and manufacture-fluorescent lamp cleaner
When cleaning indoors, the most difficult thing to deal with is the fluorescent tube, which is installed at the height of the ceiling. Only by putting up a ladder or stacking tables and chairs high can you get there, but it is still inconvenient and dangerous to scrub.
Once, the spark of an invention flashed through my mind: one should be designed to be clear and white, without climbing very high.
Gadgets for cleaning fluorescent lamps. I found a big drink bottle and intercepted a section with a bottle mouth, probably.
15cm, cut a U-shaped notch on both sides of the incision, the width of which is slightly larger than the diameter of the fluorescent tube.
Next, put a sponge in the bottle and stick it firmly. Finally find a stick with the same diameter as the bottle mouth.
Bottle mouth and pin. Fluorescent lamp cleaner is ready.
The use method is simple: lift the vacuum cleaner, aim the U-shaped notch at the fluorescent tube, and move it back and forth several times, so that the dust on the tube will be wiped clean. The sponge of the washing machine can also be washed with water.