Can anyone introduce me to a teen tech mini production?

There are a lot of them in this **, it is recommended to take a look.

Homemade hot air balloons.

1.First of all, we cut 6 to 8 leaf-shaped pieces of paper out of soft paper.

2.Fold them in half and glue their edges together to make a balloon.

3.Tape the four wires to the bottom of the balloon. Attach the other end of the thread to the table with plasticine.

4.Try to turn the speed of the hair dryer as slowly as possible. Aim the blower up at the bottom opening and turn the switch on. The balloon will slowly grow larger, tighten the string, and leave the table.

Homemade flashlight.

The specific method of making it is to remove one end of the lid of a waste can (such as a Lulu beverage can) and knock the other end with a round hammer. Roll up two No. 1 batteries with thick corrugated cardboard and put them into the tank with the positive electrode facing up and the negative electrode facing down.

Find a suitable plastic lid (such as a magic big roll lid that can be fastened to Lulu cans) and dig a small circular hole in the lid** in such a size that the bulb is plugged in tightly. Insert the base of the bulb into the small hole. Take a piece of wire hunt and peel off the wire skin at both ends, wrap one end around the lamp base, and pierce a small hole through the side of the plastic cover with the other end.

Place the plastic lid over the can. Check that the bulb and battery are in close contact. At this point, the disposable flashlight is ready.

When using, use your thumb to press the wire threaded from the side wall on the weld that is not painted from the can, the flashlight will glow, and the thumb will jump off the wire, and the flashlight will go out, which is very convenient to use.

Homemade sun cooker.

Find a concave reflector bowl on a large flashlight, and use rigid styrofoam or wood to cut a cylinder about 4 cm long, with a diameter just enough to fit into the reflector. Drill a fine hole transversely at one end of the cylinder, insert a wire with a diameter equivalent to the diameter of the hole, and then fold the two ends of the exposed wire into 90°, leaving 5 cm each. Insert the cylinder into the hole in the reflector and insert the ends of the wire into a styrofoam or wooden baseplate.

Sharpen the two ends of a thin bamboo skewer, insert one end into the cylinder of the reflective bowl**, and insert a small piece of potato at the other end. Place the device in the sun so that the reflector is facing the sun, and then patiently adjust the length of the skewers so that the potatoes are in the right spotlight. It won't be long before the potatoes are roasted in the sunlight and give off their aroma.

Homemade coloured candles.

Materials: colored crayons, wax.

Directions:1 Find a discarded canned beverage bucket (e.g. 1 25 litre Coke bottle), neatly cut off the lid, and cut the wax into the bucket.

2 Put the bucket in hot water and stir the wax inside until it melts completely. It is best to use boiling water. However, ask your parents for help or be under the supervision of your parents.

3 Pour the melted liquid into a nicely shaped container (e.g. a heart-shaped box with small pieces of chocolate). Don't pour too much. As for the reason, look down. Of course, you first need to put the thread in the container as a wick.

4 The original wax cooled, and Ah poured the molten colored crayon liquid into it according to the method of dividing the face (the colored crayons came in handy at this time). In this way, the wax of different colors is added layer by layer, and the beautiful candle is made.

The answer is small to make: solar hot water bottle.

If it's a sunny day, we make a solar hot water bottle, so that the hot water for washing your face and feet doesn't have to boil anymore.

Materials: Large black plastic bag, rope.

Method: Fill the black plastic bag with water, tie the bag tightly, and expose it to the sun (see picture). After a while, the water in the bag is warm, and it can be used to wash your face and feet.

I'm going to check it too!! Otherwise, you hand over your refrigerator.

The way of the plan is substituted into the Sadur uidjjiddfuxdsdurs

1.Clean eraser materials with brushes: large erasers, waste brushes.

Tools: scissors, glue.

How to make: 1 Dig a shallow small round hole at one end of the eraser 2 Remove the tip of the waste brush, wash and dry.

3 Cut off the tip of the brush tip to turn it into a small brush.

4 Insert the brush tip into the small round hole of the eraser and glue it firmly (finish).

2.Small production: solar hot water bottle.

Materials: Large black plastic bag, rope.

Production method: Fill the black plastic bag with water, tie the bag tightly, and expose it to the sun (see picture). After a while, the water in the bag is warm, and it can be used to wash your face and feet.

3.Ingredients: walnuts, matchsticks, plasticine, small strips of cloth.

Steps: 1. Put the walnuts on the fire with the tips down for a while, and then throw them into cold water, the walnuts will crack along the cracks.

2. Break the walnuts in half along the seams.

The ancient clock - the hourglass.

1.Take out the two jelly boxes you have eaten and make a hole in the middle of the jelly boxes.

2.Take out another clear straw and use the straw to connect the two jelly boxes together.

3.Put the sand bridge into the jelly box, and then seal the opening of the jelly box with plastic wrap. (Done).

3. Dig out the walnut kernels, leave the empty shell, and stick a small piece of plasticine inside the shell.

4. Make a sail out of matches and a small strip of cloth with "Dream" written on it, and insert it into plasticine. In this way, a "walnut ship" carrying dreams can set sail.