[thinkMOAR]

By the title I thought it was a tree 'tree', with leaves and branches :) those you can find in a forest.

Though nice howto nonetheless :)

[tobijkl]

There is also this kind of forest: http://mathworld.wolfram.com/Forest.html

[coldcode]

I also thought the same thing, along the lines of drawing Simpsons characters in CSS.