Maybe a young child, such as the one pictured on the net. It might even lead to lower levels of children wanting to become teenage mums if it is realistic about the amount of work they have to do.
The Wii caters for many niche markets, so why not this? Just because it may not be your niche, does not mean it is not everyones.
Guitar Hero type gaming is not for me, I would never touch it... but that does not stop it selling and remaining a profitable franchise.