Suggested by Gowri Kumar – here’s a video of his son Sohan playing with this software:

Its pretty useful to learn the alphabets as well…

Here’s the download link: Babysmash – by Scott Hanselman

Another nice software for kids btw is Tux Paint esp run in full screen mode.

PS: Turns out there’s an entire site called education freeware – will explore sometime, but of course with some reservation as I don’t want to make my son a comp geek 😉

PPS: Gowri recommended another really excellent free software suite known as GCompris. Its available on Ubuntu (and other OS like Mac), and a more limited version on Windows as well.