In the past couple of months Jeyanth has completely fallen for two software programs, to the extent that his television and DVD watching has fallen to zero, with every moment of his designated screen time absorbed on (my) computer.
First, it was Art Rage, a wonderful graphics package. He was sucked in by the free trial, with its oil painting style, but was totally sold when we bought him the fully featured version with spray paint, tube paint, metallic effects and the like.

Jeyanth's 'smeary painting'
Just as his excitement at Art Rage was starting to wear out, we discovered Phun. For a boy who loves building and gears and machines and cars it’s simply amazing – a 2D physics model of blocks and gears and motors and springs and chains and water and lasers, out of which you can build anything you like. For the geeks amongst us, it even allows you to control density and friction and coefficient of restitution, to graph the energy of objects and trace their paths. I’ve been playing with it most nights after he’s in bed.

One of Jeyanth's creations in Phun (with a little help)
Yesterday Jeyanth was walking home from school with a boy from the year above him, who was trying to tell Jeyanth about all the cool games he had on his x-box and his DS. Jeyanth listened for a while, then observed “But those games all have rules which tell you what you have to do. I like games where there aren’t any rules, and you can make anything you want!”.
And to finally convince me that this wasn’t sucking all his creativity into screen-based activity – today he announced that “the next thing to do is to get a load of gears and wheels and things and make some real stuff like I make in Phun”…
[Both Art Rage and Phun are available for Mac and Windows. We've since upgraded to the full version of Art Rage and to Algodoo, the commercial version of Phun, but the free versions are really worth a go.]