The Perfect Word

I was tucking boys into beds tonight and as I was up on Fynns loft bed with him he showed me, in slow motion, how he hits his head on the ceiling if he forgets and stands up real fast. He said that it really hurts. Then Rollin said, from the top bunk across the room, "yeah it hurts cuz of the nubbles" I could not contain myself! "Did you just say nubbles" I asked with large eyes. "You know the popcorn" he answered. "Yeah I know the popcorn, but did you just say nubbles?"  He gave me a shy smile and said yes.  I smiled and looked at him and said "well I think that is the perfect word for it!"