First, make a solar windmill.
1. Preparation materials: 4 round cardboard, 1 square cardboard, 4 disposable paper cups, glue, scissors, bamboo sticks and transparent tape. Draw the shapes of four small windmills on a square cardboard and cut them out. Cut the blades of each small windmill into a streamlined shape with scissors, and stick the blades on the circular cardboard with glue.
2. Drill four holes in the disposable paper cup, insert the bamboo stick into the holes, and stick the other end on the circular cardboard. Stick the transparent tape on the solar panel and put the panel under the windmill. Put the windmill in the sun and see if it can turn.
Second, make a magnetic car.
Preparation materials: 2 magnets, 2 rollers, 1 battery box, 1 battery, 1 switch, and some wires. Connect the battery box, battery, switch and lead to form a simple circuit.
2. Fix the magnets on both sides of the car wheels so that they can rotate freely. Put another magnet next to the battery box. When the switch is pressed, the car should be able to be pushed forward.
Third, make simple meteorological instruments.
Preparation materials: 1 plastic bottle, 1 balloon, 1 thermometer, 1 hygrometer, some tapes and scissors. Cut the plastic bottle in half and fix the lower part on the table with adhesive tape. Put the balloon on the plastic bottle mouth and fix them together with tape.
2. Insert the thermometer and hygrometer into the balloon and fix it on the balloon with adhesive tape. Put the whole device outdoors and observe the change of meteorological data.
Importance of small-scale production of science and technology
1. First of all, small technological productions can cultivate children's creativity and imagination. In the production process, children need to keep trying, exploring and improving. This process will stimulate their thinking activities and make them think from different angles, thus creating unique works.
Secondly, small technological productions can improve children's practical ability and problem-solving ability. In the production process, children need to do it themselves to complete the assembly, construction, debugging and other work. This process not only exercises their hand-eye coordination ability, but also helps them learn how to solve problems and cultivate their independent thinking ability and problem-solving ability.
Third, small technological productions can enhance children's self-confidence and sense of accomplishment. When children finish a small technological production, they will feel very proud and satisfied, because it is their own creative achievement. This sense of accomplishment and self-confidence will encourage them to try and innovate more bravely in their future study and life.
Finally, small technological productions can also cultivate children's teamwork ability. In the production process, children can help each other, learn together and share experiences. This kind of teamwork ability is very important for children's growth and development, which can make them better adapt to social life.