Actually, I carry a tool knife in my purse. It's come in handy on more than one occasion.
When I was a Brownie leader... I had each one of the girls (ages 7-10) bring their knives on a camping trip to teach them how to use and store it properly. The Mom's were a bit frantic at first....but were very surprised at how seriously the girls took instruction. No one ever got hurt or tried to stab anyone.
PC once again.....out-of-control.