This article apply to all apps, not just toddler apps. As Jack Dorsey of Twitter said not too long ago, making things that are very simple turns out to be very

This article apply to all apps, not just toddler apps. As Jack Dorsey of Twitter said not too long ago, making things that are very simple turns out to be very difficult. Simple interfaces with big buttons, modal dialogs always fixed position in the middle of the screen, and bold colors are the future.