Here's one of Mitch O'Connell's choice flea market finds: A catalog from JC Penny's Big Men's Shop. "Exciting colors and eye-catching patterns."
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects