Poll board

The same poll, words and rules as the call's poll app, on the whiteboard. Ask one on the sheet; tap an option to vote and again on another to change it. As the asker, hide the results (they go under a sheet the asker can see through), reveal them, close the poll and start a new one from the tray. A vote that arrives while the board is open is drawn in a stroke at a time; votes already there when it opens are simply there.