I found the demo useful because I was able to see how everything worked. However, I would have liked more information on what all of the lines mean.
If I were to repeat this exercise I would have added a more fun flag that actually did something.
I modified the flag and the pencil by using a dowel instead of a flag and pencil. Because of this I had to glue the circle to the dowel to make it turn in unison.
I do not know what other mechanisms I would like to make.
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