I really love the idea of Thorax and Sunburst doing things together. In my headcanon Sunburst was put in charge of looking after / watching over this new addition to the kingdom. The chance to study a changeling would probably sound really good to him. I'm sure I'll do more with these two in the future.

So, after a while, what does a changeling do now that he's got a stable home, doesn't have to worry about being imprisoned and presumable the food situation has been worked out? How about a hobby.

This is actually a dumb joke that's been in the back of my mind for 3 years and I never got around to. Then it spawned a few more, but this is probably my favorite. :)