OK, we've brainstormed our ideas, and decided a Wiimote might be the way forward. But does the idea stand up?

Our first practical step will be to put a Wii with something straightforward like Wii Sports in the hands of someone from an older generation and see whether they find it intuitive. Can they just pick up the Wiimote and play Wii Sports without a steep learning curve, or is is not going to be something they'll enjoy?

Time to go away and ask my older friends very nicely...