Ask HN: iPhone Educational Apps

This was originally submitted as a story, now resubmitted as an Ask.

My daughter started playing with my iPhone when she was about 18 months old and now, a little over a year later, she's very adept at using it to play games and watch videos. The iPhone/iPod Touch platform is very child-friendly and the interface is intuitive and easy to use. I was apprehensive about letting her play with such an expensive device at first, but I always supervised her and, even without a protective case, the iPhone isn't as fragile as some people may believe. In contrast to the toys and games she quickly outgrew, it's reached the point where I have to limit her use of the iPhone. I think the market for toddler educational apps will explode once a killer app is written and parents realize the potential of the mobile platform. Does anyone else share my views and is interested in some sort of collaboration? I am open to any and all ideas.