'Flushed' With Success: This Print-Based Ad Campaign Is an Extra-Base Hit

Today’s edition of "Just Try That With an iPad" comes to you courtesy of a longtime Dead Tree Edition reader, who apparently has the unusual hobby of shooting photos in crowded public restrooms.

Yeah, you know, HAUBs—heat-activated urinal billboards. The message on these little billboards isn’t revealed until some "P" is added to the H-A-U-B, thanks to the magic of heat-activated inks.

Can e-ink do that?