Hoka @galenkp, it is clear that by playing your nephew, even as a child, has learned very important and useful things for life.
Since you asked a question, I'll answer you: I don't remember ever giving up. The only time I remember giving up on a project is because once it materialized I realized it wasn't for me. I had invested a lot of time, but I also think you have to know when to pull out of a project and not keep investing more time and effort. In return, I now practice a profession that I love.