I'm not sure where to direct you, but I was a BIG time daydreamer. For me, it meant a lack of challenge, boredom. I still have the same problem as an adult working in a very boring field.

I'd say definitely get her IQ tested, etc... she's a girl, and most tend to do the daydreaming as opposed to acting out like boys. To me it's the same reason, different output (behavior).