Building and running mechanical computers is fun, but sorting the balls at the end and putting them back up on top is, dare I say, not. One of the most consistent bits of feedback I get is that no one likes to return the balls back to the top.
Challenge #3 is this: Can you figure out a simple, elegant way to do any of the following things?
Extract the balls from the output more easily
Sort the red and blue balls automatically (maybe they could be a slightly different size?)
Return the balls to the top more easily
Excited to see what you come up with!