Small production of scientific and technological creativity (commonly used materials, middle school students' level)

Materials forecast weather paper flowers: pink paper, disposable paper cups, straws, ornaments, salt water, newspapers.

Production process: stick a pink paper cut into petals and coated with salt water, wash and dry, end the straw-woven flowers, fill the newspaper with soil (press the newspaper with water), and decorate your hands to establish two sides of the center in the paper cup.

"The petals are thick in color, and soon the weather will be wet or rainy, light in weight and sunny.

Homemade hot air balloon

First, we cut 25% to 30 leaves of paper from soft paper. They are folded and glued together to make balloons. These four joints are tied to the bottom of the balloon. The other end of the rubber line? Fixed on the bed. Try to adjust the speed, the hair dryer is very slow. Turn on the switch on the bottom vent. The balloon will gradually get bigger, and the tight line will leave the desktop. Homemade soap paper

Materials and tools: homemade soap paper.

Materials and tools produced:

Small white soap with better hygroscopicity. pot

Production method:

The first jar for chopping soap in the future, water made of soapy water, a white paper-cut the size of a matchbox, coated with transparent liquid soap, and then took out a blank sheet of paper, because soap paper hung it and it became dry. Homemade wall basket

Materials and tools

Sprite bottle, glue, knife, scissors, nails.

Production method:

1。 Green background adopts Sprite bottle, lotus-shaped incision, turned down, and the bottle sticks to the foundation. 2。 Cut a green ring two centimeters wide and put it on the end of the green bottle. 3。 Eliminate the bottleneck and cut out a bottle with a length of 13cm, a width of 8%, a width of 1 and a width of 3cm. 4。 The meat cleaver carves flowers at a narrow 3 cm place, and then inserts these narrow outward-turned green rings from the bottom. 5。 For other beverage bottles, 6 capsule leaf bottles, length 17 cm, were cut out with scissors. The basket is nailed to the wall, and the leaves and flowers are cleaned with an eraser.

If a word is written incorrectly, there will always be a lot of fragments after wiping the paper with an eraser. It is unhealthy to slap or blow with your mouth, but it is troublesome. It won't be any trouble to make a clean eraser.

Material: rubber, waste brush.

Tools: scissors, glue.

Production method:

1。 Eraser dig a small hole, shallow 2. Take out the discarded brush head, wash it and dry it.

/& gt； 3。 Cut off the tip of the brush head to make a small brush.

4。 Rubber and glue are embedded in the brush head hole.

/& gt； The eraser is clean. After each glue wipe, you can gently sweep the scraps of paper with a brush for half a day, and then pour them into the wastebasket. Innovative production method of gizmos 1, 1, 2, rubber belt with a glass ball and a homemade badminton.

Preparation materials: empty bottle foam fruit net cover.

Production process:

1。 250 ml empty bottle, the upper part of the bottle body is cut;

2。 Divide the cut part into eight parts, wrap the bottle around the neck with scissors, and then cut it into the same size as each petal;

The foam fruit net is sleeved outside the condom in the bottle and fixed on the bottle with a rubber band;

4。 Glass marbles wrapped in foam fruit net are put into a bottle and inserted into the exposed cm;

5。 Table tennis is cut in half, the bottom of the hemisphere covers the bottle mouth, the four sides are cut, and the covered bottle is fixed with a rubber band.

6。 Beautify and complete a homemade badminton. A dozen badminton rackets, how do you see the effect?

Self-made cockroach catching box

Need a 220× 150 (mm).

The capture box captures the most important part of the surface. Use plastic film, the border cut at the bottom is the same size, and the square at the bottom is coated with glue. The key to catching cockroaches is adhesive. The adhesive has two functions: one is to introduce cockroaches into the box, and the other is to consolidate the catching surface. Seduction preparation: 40% meat powder, 50% flour, 10% bean cake, about 20 grams, curing position. The adhesive is 20% Erickson essence, mixed with 10g vegetable oil, heated to chewing gum, lured and mixed with the adhesive, and stirred evenly.

Uniformly coating the slurry on the plastic film that has been scored on the capture surface, then cutting at the dotted line, and so on. Insert your tongue into your mouth and fold it inward.

Because the mixture of non-rosin and vegetable oil is dry, the viscosity of the bait can be maintained for one week. The collection box is placed in the place where cockroaches haunt, because it is dark. Whether it is a bait such as a cockroach, the cockroach climbs into the box and collides with the bait. Hang in there. When the cassette is full, it can be crushed and discarded, and the plastic film that can be peeled off can be transferred to the plastic film coated with bait, so that the cassette can be used again.

The expansion of the collection box, lovely mousetrap watermark paper.

I thought that the composition of paper glue was slightly adjusted, and the beautiful pattern was not drawn from the thicker coating. How to make it?

Materials: a washbasin, 1-2 pieces of rice paper, a chopstick, a cotton swab, a bottle of ink and water (about half a basin).

The operation is as follows:

1, pour a basin of water in front of the bowl and gently dip the water on the surface with chopsticks dipped in ink. You can see the water on the surface of the ink.

Extend into a circle.

2. Rub the cotton swab on the scalp for two or three times.

3, the center of the ink circle pattern, gently circle, and see what will happen.

4. Cover the rice paper gently with water, and then slowly pick up the paper to print what pattern?

Description:

1, stained with ink with a cotton swab will expand into an irregular circular pattern.

2, a small amount of oil coated on the scalp rubbing cotton swabs, affecting the power of water molecules.

3. The watermark will display irregular concentric circles.

Create:?

Try other methods to change the moisture on the ink surface of the pattern.

6, homemade colored candles

Materials: colored crayons, wax

Production method:

1。 Find an abandoned canned beverage barrel (1.25 liter coke bottle), cut off a part of the lid neatly, and cut the wax into barrels.

2。 The heat of the barrel-shaped man stirred the wax inside and made it all melt. The best water. But ask them for help, or ask your parents to keep this step.

3。 Pour the melted liquid into a beautifully shaped container (for example, a small piece of chocolate is a heart-shaped box). Don't pour too much. Why? Please read on. Of course, you must put the candle as a wick in the container.

4。 The original method of wax cooling Gordon was to melt the crayon liquid according to the face of the cloth (crayons came in handy at this time). Add this layer of wax of different colors and it is a beautiful candle.