Whatever knife you get, assuming it will be a folder, just be sure that it has a locking blade. Blades will fold up on kids just as easily as they will on adults. I am personally not a fan of the SAK's, prefering a single blade or a Leatherman, but that is just me. If you have a cutlery shop nearby, or any store with a good selection, you might take her by and let her "play" with a bunch, it should be pretty easy to see which one(s) she falls in love with...