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Therbligs Binder

Therbligs Binder

Therbligs have their own story ... see here. I made this design years ago, to keep Frank Gilbreth's concept alive. Visit Product Page ...
Pharaoh-dynamics Notecard

Pharaoh-dynamics Notecard

I'm always looking for new verbal/visual puns to add to my Mad Sciences images ... This one has a hidden bit of humor for the typographers. Visit Product Page ...
Evan's Pi Keychain

Evan's Pi Keychain

My most popular image ever ... usually on stickers or other small items, but I have sold two pairs of Pi shoes! Somewhere, a math teacher is smiling. Visit Product Page ...