Spare time project

I looking for an idea for a project to build in my spare time. I recently made a HTML5 media player and I wanted to do something different.

I recently learnt nodejs and websockets so that would make an awesome project but while I was learning I made a chat room.

Anyone have any ideas?

How about creating html5 applications for iphones? :)
The answer my friend is blowing in the wind... ;)

html5 cartoon? http://www.optimum7.com/css3-man/

That is not a bad shout. I have not done much CSS animation.

Thanks dude.