You can check the other sandboxes for ideas.
Basically, you can freely monkey around, here.
Sandboxes are, as I had rather nicely put it before, self-contained gaming environments.
Not unlike a Java sandbox.
You can use them to play out situation unlikely to happen in the real game.
Bring in illegal characters.
Have schtuff happen for the fun of it.
It's your char's blog, if you'd prefer.
Or a test area for your writing skills.
A clean slate for you to fill.
You name it.
You can play Kymis's past.
Or her future.
Or another char's life altogether.
Sky is the limit.
Actually, server load is... but it was a nifty nice figure of speech.
Don't do anything I wouldn't find a word for, over urbandic.com.