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This is a mechanism I came up with to make a set of eyes that move back and forth (left and right). Frankie's Girl wanted a pair of moving eyes for a prop she is making and also (if possible) have them pause a second or two before changing directions. This is what I ended up making after a lot of trial and error:

The eyes themselves are ping-pong balls. The pupils haven't been painted on yet, I just stuck some round pieces of blue tape on them for reference.

The eyes themselves are ping-pong balls. The pupils haven't been painted on yet, I just stuck some round pieces of blue tape on them for reference.