This is the app you've been reading about, the one created by a 9-year-old. Lim Ding Wen lives in Singapore and he's created a really fun and inventive sketch pad for little iPhoners. Doodle Kids (available here) lets you draw with a line of random shapes in random colors. To clear the screen, give it a shake. Tapping with two fingers gives you a clear screen in a different color.