How about getting her, her very own pocket "knife", that she can carry and use pretty much without supervision? I'm thinking something like:
http://www2.knifecenter.com/item/CA207W/case-wooden-pocket-knife-kit-mini-trapper
Might be a useful tool in teaching her correct handling of a knife, without the need of copious amounts of bandaids.
(In my opinion, kids should be atleast 6-7 before handling a knife for real.)