I'm in my first generation, and then Polly had her first daughter named Kristina. How long will she be carrying Krissy around for? And then, can I change her name? I like the name, but I just want to know for future knowledge. Thanks!

about 4 hours

If you are playing the game on Windows or Mac, you can change the name, yes

The iPod version, however, does not support name changes.

Thanks!