This afternoon Tgirl and Tboy presented TDaddy and I with the following list (complete with stick figure illustrations):
"We think we should play Wii because
1. In the Star Wars game we have to work together to be able to pass the level.
2. It helps us get our energy out before we go to bed.
3. It helps us exercize."
Combined with no whining or fighting for the rest of the afternoon, their presentation was successful and TDaddy even let them stay up 20 minutes late playing.