Every parent who has taken a long car trip or flight with offspring in tow knows that the difference between a pleasant journey and a stressful, tiring marathon may come down to one key factor: can you keep the kids entertained (and fed) through it? If so, everyone's happier. This task is dramatically easier in the age of the iPad than it was before, but it's still not easy to find apps that appeal to kids of different ages and interests.
The margin between a good children's app and a great one may be narrow, but when you see kids on a long trip getting engaged with an app for solid stretches -- without flipping back to cartoons, without taking Angry Birds/Peggle/Call of Atlantis breaks, and with a hi
