I'm all about apps that promote early learning (pre-school) type of content.

I built one of such apps (http://itunes.apple.com/us/app/toddler-trainer-hd/id49632353...) and took extra care to tuck away all menus and settings in a triple-clicked menu, so toddlers can't access it.

Interesting article and suggestions. I'll have to incorporate a few of the ideas.