We'll be making our first trip to Disney in Apr. 09. I just bought some pins and would like to give them to my kids for Christmas on a lanyard to start their collections for trading. I'm wondering what the best kind is to get and where to buy them. Is there a style that is more popular in the park? I've seen a couple of different kinds of lanyards, some have the plastic thing at the bottom (what is this for? tickets? fastpasses? I'm clueless..), some have medallions... We'll be on the DP, and I was wondering if everyone has to show their card for that. We'll be staying a the Poly, do they sell them there? I'm just full of questions. Thanks!