My kids (9,7,5) want to start trading pins at WDW. They are not serious enough to be collectors so it is all for fun. Any suggestions or tips to how to go about. I was going to buy some pins from Amazon that had a handful and all reviews were mixed about what were authentic and not. If they are only doing it for fun with cast members and each other does it matter? What about carrying them? I was told they get too heavy carrying them around on a lanyard.