A young boy learns from a mentor.
CoderDojo, co-founded by 20-year-old James Whelton, 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. Primarily volunteer-run and free of charge to attendees, CoderDojo has developed its own Google-like motto to describe its mission: Above All: Be Cool. The effort is intended to spawn the next generation of app developers. Already, the effort has fostered the development of a wide range of teenage developers--and some as young as 12. Special report