Try these:
Wii Visit - a travel sim. Think of the 'little USA' segment of Pilotwings 64 and add in sandbox cities. Two versions at least - Wii Travel: Europe and Wii: Travel USA. Get to explore the world - open ended like Endless Ocean, part educational, part just going Wow at stuff. I seriously think something very good and widely accessible could be made of this, especially if there's an SD card pack-in to hold all the data.
Wii History - same sort of thing, but in time. Basic mechanic is when you (the player, as your Mii) talk to someone else in the game you take over that character, take over their life. So if you talk to someone 50 years older than you you're going back 50 years in time. That way you can explore the whole of history one conversation at a time, skipping back and forth and up and down a family tree. Again, educational, accessible and potentially a lot of fun. Bring history alive in a way that's never been done before.