When Douglas gets ready to go to work in the morning, he puts his hat on. That is a cue for Levi that Pop is about to leave. He signs "hat" and drops whatever he is doing at that moment to say goodbye. He also started signing "thank you." When he hands someone an object, he signs "thank you." Um. It's the other way around, sweetheart.
The teacher in me saw an opportunity. So I pounced.