CoderDojo has grown far beyond its home base of Ireland with 104 clubs spread across Italy, Sweden, South Africa, Russia, Japan and many other countries. In the U.S. alone there are more than 25 local CoderDojos, with the most recent one set up in Silicon Valley, Calif. Already, the effort has fostered the development of a wide range of teenage developers--and some as young as 12. Special report
Developers quickly learn they're going to have to go through a number of steps before Apple approves their app, but Harry Moran faced an extra, unusual hurdle before his work made it into the Mac App Store: his mother had to sign the contract.