I just saw this at the slinging.org forum. Simply some flour inside balloons, pretty cool though. They mentioned they use this in LARP or re-enactment. [ame]https://www.youtube.com/watch?v=SyfxIryiD8A[/ame] OR use sand instead of flour if you want bigger mass: [ame]https://www.youtube.com/watch?v=5nQQk8meHXE[/ame] Also an alternative, someone in the thread there mentioned using sock balls. Rolled up socks with some simple rubber bands around them. I will definitely try this How about other ideas for non lethal and harmless projectiles? What do you use?