Lim Ding Wen, a nine-year-old Malaysian from Singapore, is probably the youngest registered iPhone developer, as he created the application known as Doodle Kids. According to Reuters, Ding Wen designed the program in such a way that it draws random shapes and colors with random sizes as you move your fingers across the touch-screen. Drag two fingers across the screen and you get a random gradient in the background. Shake the device and the screen clears.

Doodle Kids has been downloaded over 4,000 times from Apple's iTunes store in two weeks, the New Paper reported on Thursday.
And what's even more remarkable, Ding Wen initially wrote Doodle Kids for the Apple IIGS computer. The program was created as a result of Ding Wen's desire to learn event driven programming.

The young wizard wrote the main program logic in Pascal and used QuickDraw APIs to draw shapes on the screen. Similarly to his iPhone version, the Apple IIGS Doodle Kids lets them draw shapes in full screen and animate using an old-school "trick" called color rotation.
Moreover Lim told Reuters that he “wrote the program for my younger sisters [3 and 5], who like to draw,” Lim said. Apparently he is already fluent in six programming languages.

The boy, who enjoys reading books on programming, has been programming since he was seven and he is in the process of writing another iPhone application: a science fiction game called "Invader Wars." Thus far, he has finished somewhere around 20 programming projects.