My throwing knives should arrive tomorrow, decided to turn my boxes into a target. Not sure how well the knives are going to stick, but it can stop and hold a BB from a C02 gun in the first few pieces of cardboard. I've got 4 pieces of cardboard, then some Styrofoam cushion, then 4 more pieces.
We will see... the throwing knives I ordered are pretty light, so I'm hoping they stick.
I got them because it'* actually a decent workout if you throw them for a half hour or so. A good way to relieve stress as well. A friend of mine has a set that I was messing around with. My arm was sore for a week afterwards, so maybe I will stretch before I try them out. :P