From one of my favorite blogs, $5 Finds: a Micro Sonic Grenade.
Want to scare the living crap out of somebody? Well nothing better than a grenade explosion sound at 110 decibles. You can set the “explosion” timer to 5, 30 or 60 seconds then BOOM it happens. Battery powered and ready to scare.Micro Sonic Grenade for $5
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.