Up Dreams! and other alt. realities

My older son (4) got a bit annoyed with me today because I didn't know what and "up dream" was. It's an awake dream" he told me excitedly. (DUH MOM)

son : "I had another one, I was a power ranger and there was a girl"

me : (thinking to myself, a girl, why is he dreaming of girls he is only 4) "What was the girl doing?"

son: "she turned into a power ranger- we just transformed ourselves."

he danced merrily off to "up dream" some more.