1, making a simple motor:
Materials required: battery, wire, spool, wooden stick, scissors. Step: Fix the spool on the wooden stick to form a shaft. Connect the positive electrode and negative electrode of the battery to both ends of the spool with wires. Some wires are wound on the bobbin to make it have a rotating force. After completing the circuit connection, observe whether the shaft can rotate smoothly.
2, making mini slings:
Materials required: paper cups, balloons, scissors, string.
Step: cut off the bottom of the paper cup to make it a hollow cup. Cut a small hole in the balloon, blow the balloon, and then tie the balloon mouth tightly. Put the balloon into the paper cup and fix the balloon and the paper cup with a string. Push the paper cup gently to see if the balloon can bounce smoothly.
3, making simple periscope:
Materials required: two transparent plastic cups, water, scissors and adhesive tape.
Step: Cut off the bottom of a plastic cup and pour in some water. Dig a round hole in the center of the bottom of another plastic cup, the same size as the bottom of the first cup. Invert the plastic cup filled with water and stick its bottom on the round hole of another plastic cup. Observe the position of the water, try to adjust the angle of the cup and see if you can see the objects on the water clearly.
4, making elastic car:
Materials required: wooden board, pulley, spring, scissors, string.
Steps: Cut the board into the shape of a car with scissors. Fix a pulley on the board, pass a string through the pulley, and tie a spring at the other end. Fix the other end of the spring on the board to make it elastic. Push the car gently and observe whether the spring can make the car move smoothly.
These small technological crafts are simple and interesting, and can help you feel the wonder of technology. In the production process, you can also innovate and improve according to your own needs and interests. Try it and enjoy the combination of technology and handwork.