Our son has now been to five states; we recently added Wyoming. He had an amazing time there. His favorite part, of course, was picking out the three souvenirs he was allowed to pick. This sparked a discussion about what qualified as a souvenir. Toys obviously don't. In one store we went in, he picked out seven or eight things he was interested in, lined them up on the floor, and eliminated them one by one. I'm not sure what his process was, but he finally got it down to one. Before we left Wyoming, he had acquired four items because the Iron Man magnet he just had to have CLEARLY did not qualify as a souvenir.