Scalpels have all sorts of uses outside of medicine. Also called a lancet, bistoury, or a hobby knife they are used in various arts and crafts. This video compares three of the compact folding variety useful for keychain carry and mini survival kit use.
Scalpels and razor knives are great for precise, small cuts and are extremely sharp so keep them, and razor blades, out of the reach of children. Here is a link to the Mack the Knife (MK I and II) basic tutorials: https://www.youtube.com/watch?v=yTALEwGqBMs&list=PLopFQDqBAHLizN79X0EOeclcB210FWqb9&index=3
Here's the Poorman's Swiss Army Knife Alox vid: https://www.youtube.com/watch?v=jvMsdsczSbs
