We then changed themes within our topic of 'Inventions' to cars, and used what we had learnt to make simple electric toy cars with the aim of a race. Here are some of the designs:
Here we are making our cars:
Here is one of the final cars in action (below). They did work, just slowly! We found that the weight of the parts slowed the car down; and it needed a larger propellor with longer blades to work more effectively.
Again, we found lots of project and design ideas on YouTube. Here are just a couple of the designs possible and using different systems. The first is the one we tried and evaluated. The second is another option:
This one uses an electric toothbrush for the motor, and is driven using a simple differential:
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