Here's Instructables co-founders Eric and Kristy testing out their $150 treadmill desk, which allows them to work and walk at the same time. Their incredibly cute baby seems to enjoy it.
This is related to my earlier post about Seth Roberts observation that doing two different boring things at the same time can be fun.
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.