You know you’ve changed the way software is created, marketed and sold when a 9 year old can do it:

The creator of Doodle Kids, a finger painting app downloaded 4,000 times in two weeks from the App Store, is more than just a kid at heart. He hasn’t even entered middle school.  Lim Ding Wen, 9, of Singapore, said he was just trying to give his siblings something to do.  “I wrote the program for my younger sisters, who like to draw,” he told the BBC. “But I am happy that people like it.”