Very cute stuff, and funky! As for a niche, I'm not sure I've got anything really truly out of the box, except myself - I'm a lawyer/face painter/soaper. So in general, I'm probably one of a kind.
Incredibly cool stuff! I, too, am working on a niche completely different than yours! I truly believe that baby stuff doesn't have to be "pink" or "blue!" Even though mine hasn't caught on like yours has (congrats), I'm encouraged to know that different is still okay!