To Maura, an adult is 'human.' I'm not sure how this distinction came about, but I find if hilarious and love it.
The other day she asked when she would be a human. I told her that it is usually 18yrs old, but sometimes if you are obedient, make good decisions and are a good child, you could be a human sooner, maybe around 14 or 16yrs. old.
After a long pause of thinking, she responded, "I think I'll wait for the other number."