One of the shirt designs is an illustration I drew in 1990 for T-shirts that I sold in my print zine, bOING bOING. It features the zine's mascot Kata Sutra, a secret agent for the NeoWobblies.
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. Come and hear Mark speak at the ALA conference in Chicago on July 1.