Mathematics buffs will get a kick out of The Klein Four

[PopHistorian]

Direct from the Mathematics Department at Northwestern University, The Klein Four!

VIDEO:
http://www.youtube.com/watch?v=UTby_e4-Rhg

WEB SITE:
http://www.kleinfour.com/

ALBUM REVIEW:
http://www.cafepress.com/kleinfour.22765484?pid=4640032