As a parent, how would you feel about finding these items in your house? http://www.davesbrain.ca/miscpix/shells.jpg [Broken] These are about the size of .22 cartridges. It says 'cartridges for low velocity tools'. That's like an airgun, right? I would be very unhappy to find fireworks hidden under my couch, so I'm very unhappy to find these. What I don't know is if this is cause for concern merely like firecrackers (a talking-to), or dangerous, like bullets (grounds for consequences of extreme prejudice).