we just started caching this past weekend, and before our first find i hit the local walmart to stock up trading swag. i got a plastic container to keep in the car and filled it up with mostly kid type stuff since we have 3 boys that will be doing most of the trading. silly putty, playdoh, stencils, bubbles, girly hair stuff, card games. i also threw in some more adult toys like carbiners, magnets, little notebooks. we dont have pets but i know lots of people bring their dogs along, so we stocked up on some tennis balls too. i think total it was about $30 for the swag kit to keep in the car.
we are new, but trying to keep with the spirit of the game. we did find some caches this weekend, unfortunately they were too small for swag anyway.
i like the idea of the batteries, think ill put those in the kit next time i restock.
currently we are trying to come up with some kind of signature item to leave behind wherever we go. i wouldnt mind some ideas on these!