Dan Waber’s Another Tool for Discovering your Favorite Letter (ATDFL) is an online interactive poem, a mandala-like, kaleidoscopic hallucinogenic roundabout tilt-a-whirl hurricane pinwheel rabbit's hole sawblade exploration of the letters of the alphabet and the keyboard.
You type a key and on the screen that glyph begins rotating. The up and down arrow keys allow you to control the opacity — how much of a visual trail the letters leave. The left and right arrow keys control the speed of rotation. And the space bar allows you to do that roller rink thing where suddenly, everyone — G, }, h, and * — skates in the opposite direction. There’s also an option for choosing the font. I think I might have a fontcrush on Times Roman h.