We take people down a hallway and find any open door. Then we go in the room and slowly close the door and say "Bye, bye. Bye, bye. Bye, bye." Then when it's ALMOST shut, we... Open it and laugh really hard!
Then we close it and say "Bye, bye."
Then we open it.
We can do this for incredibly long periods of time. You would be amazed. And we do it throughout the day. It has yet to get boring. I love to see how tickled Aaron gets with this game!