My 2 year old got one after they asked me if our trip was his first (when I went to get my Birthday button). I told them no, that he was there the year before, but didn't know there was a "first time" button to be had. I thought it was given for "first time" visits, but I've recently found out there's an actual "first time" button, so maybe it was just in honor of his first visit that he might actually remember (and he does, at this point, remember it).