While most children his age sketch on paper with crayons, nine-year old Lim Ding Wen, has a very different canvas — his iPhone. He made this program for his sisters aged three and five, who like to draw. Lim, who is in fourth grade in Singapore, writes applications for Apple’s iPhone. His latest, a painting program called Doodle Kids. The program lets iPhone users draw with their fingers on the touchscreen and then clear the screen by shaking the phone.

Lim, who is fluent in six programming languages, started using the computer at the age of two. He has since completed about 20 programming projects. His father, Lim Thye Chean, a chief technology officer at a local technology firm, also writes iPhone applications.