Not sure if it is still going on but it used to be at The Little Green Men shop when it was called something else. It's the pin trading shop next to Buzz. The class was great. You had to sign up, then at the scheduled time a CM sat with all the kids (adults too) and explained the history and rules of pin trading. Throughout the talk, there were trivia questions and each person got a magic egg that you couldn't open until the end. The CM was so great at making sure that every kid got an egg, even some adults got them too. At the end, we opened the eggs and there was a pin inside. The CM then uncovered a huge board full of pins. Everyone got to trade if they wanted to. I think my son and I ended up with 4 pins in total.