With the ages of your kids, they very well could get into pin trading in a big way. It is lots of fun for kids (and adults) and a great way for them to have special interaction with Cast Mambers etc. I would also suggest going the eBay route and getting a pin lot and unless you want to end up buying more in the parks for $7 and up, I would buy more than you think that you will want. When you buy lots on eBay you actually want 'ugly' pins or your kids will want those and not want to trade them, and then you will get stuck buy more pins to trade. Also do a search here for Energizer batteries and kellogg's cereal, there are pin deals with both of those products to get pins for free (with purchase). My DD7 absolutely LOVES pin trading and it is one of her favorite parts of our vacation.