Let's face it, if you have an iPhone and small children you know that it is unwise to be without some emergency apps on there just for them. Trying to lie in while they sit on your chest demanding Weetabix? In the car just at the moment when 'I Spy' has run it's course? Distracting the big one while you change the little one's nappy? There are countless situations where you'll be grateful for a decent spread of activities aimed at little people who love nothing more than to get their mucky paws on your iPhone.
Check out this post from Lil Sugar for some good ideas. If you've found any that you like that are missing from the list, add a comment below! Personally, for production values, music that doesn't sound like it was played on the Fisher Price keyboard Granddad bought them, and charming illustration, I've yet to see something better than ABC Oddity (pictured above).