Went to Disneyland yesterday and as we went past the guy at the entrance to the Space Mountain queue he gave us a red plastic card on a lanyard and told us to give it to the "how many in your party" guy inside. He said it was used to track how long the wait was. We got another one when we used our Fastpasses for Roger Rabbit.
Was it just a crazy coincidence that after never seeing these before we got two on the same day? Or is this a new system?