## How to Make a Toy Car Engine
Materials
* Small electric motor (3-6 volts)
* 9-volt battery
* Battery clip
* Wire
* Cardboard
* Glue
* Scissors
* Straw
* Tape
Instructions
1. Cut a rectangular piece of cardboard that is about 4 inches long and 2 inches wide.
2. Fold the cardboard in half lengthwise.
3. Cut a small hole in the center of the cardboard, about 1 inch from the top.
4. Insert the electric motor into the hole.
5. Bend the motor wires so that they are pointing out the back of the cardboard.
6. Connect the battery clip to the battery.
7. Connect the wires from the electric motor to the battery clip.
8. Cut a small piece of straw and insert it into the hole in the cardboard.
9. Tape the straw in place.
10. Your toy car engine is now complete!
How it Works
The electric motor in your toy car engine converts electrical energy into mechanical energy. When you connect the battery to the motor, the motor starts to spin. The straw attached to the motor’s shaft converts the spinning motion of the motor into linear motion, which is what makes the car move.
Troubleshooting
If your toy car engine is not working, check the following:
* Make sure that the battery is connected correctly.
* Make sure that the wires are connected to the motor correctly.
* Make sure that the straw is inserted into the hole in the cardboard correctly.
* Make sure that the straw is not blocked.
If you have checked all of these things and your toy car engine is still not working, the motor may be defective.
Tips
* You can use a larger or smaller electric motor to make a faster or slower toy car engine.
* You can use different types of cardboard to make different types of toy cars.
* You can decorate your toy car with paint, markers, or stickers.
Conclusion
Making a toy car engine is a fun and easy project that can be enjoyed by people of all ages. With a few simple materials, you can create a toy that will provide hours of entertainment.
