Math Doodles

Lawyer Mom, bless her, emailed me a link to Vi Hart: Math Doodles. Vi is a "recreational mathemusician" (best job ever? I think so!) and when she's not busy being awesome has a whole bunch of math, music, and general neat stuff she does online. Take this video, for instance, about infinite snakes on a plane:





And even a section on math & beads: hyperbolic planes with beads! I'm already contemplating ways of turning those into pendants.