If you decide to get some, get the ones with the colored caps. They have a much more reliable detonation time. If you have a place that allows them and counts any grenade that causes a BB strike as a kill and so e that just call all successfully detonated grenades a room kill, they're awesome. The sound adds a form of realism that you can't really get from anything else like it. I personally add no more than 1/4 cup of baby powder along with about 100 or less BB's to mine. It will make the detonation time shorter, but you'll get a cool and pleasant smelling poof of smoke along with it sending BB's everywhere. The powered also doubles as a sound dampener when you run around with the BB's inside making it not sound like a baby rattle. Also if some dishonest $@"%% decides to steal it after you toss it somewhere on the field, you're not out as much money as with a tornado grenade.