Fashion a bandaid out of leaves
While out walking with the family, my 4 year old son's finger started hurting (from him picking his fingernails). He wanted a band-aid (now!), crying was immenent, and we were a 15 minute walk back to the car. I grabbed some long leaves from a nearby tree, and tied them around his finger. It was a great game, a novelty, and worked perfectly. No crying. My 1 year old also wanted one, and my wife and I were also made to wear them.
Alternately, there are these pickle bandages.
More: Health/development tips