Sound wave bracelets

I found these over at the Make magazine blog and I think they're pretty cool. I love the design idea - theyre a custom bracelet of a soundwave renered in 3D. They're actually part of some anti-drug campaign or something; the idea being that a parent records an anti-drug related message and the kid keeps it with them always. I would make a bunch of these for my friends, but unfortunately I can't see anything on the site about recording non-drug-related messages. How sad.