As No. 1 and I were walking down the sidewalk, I said, "So, if a noun is a thing, and a verb is a word about doing something, then what kind of word is run?"   "A verb!"   "OK, what kind of a word is boot?"   "A noun!  It's a thing."   "Cool, so what kind of a word is shoe?" I asked.   "A verb!"   "Really?"   "Yes!"   I thought perhaps No. 1 was confusing an action with the thing she did it with, so I asked, "Verbs are actions right, so how do you figure?"   To which No 1 responded with a furrowed brow, in all seriousness, "Well, like when you want us to leave a room, you say, "Shoo!" and we leave.  So, shooing is doing something."