yes, I much enjoyed flipcode.com back in the day, particularly Alex Champandards series - http://www.flipcode.com/archives/The_Art_of_Demomaking-Issue...

I played with Javascript sine animations as a way of introduce the idea of sine function in some intuitive way.

Eg Two Rotating Circles - http://quantblog.wordpress.com/2011/10/05/adding-circles-jav...

I think Javascript hacking in a web page is todays equivalent to hacking GW-Basic, Turbo Pascal or A86 assembler for my generation.