I don't know if this has been shared in the forums yet. OCRegister posted an article describing the new 'Glow with the Show' ear hats. These new smart hats premiered last night at WOC during the DCA media event. Furthermore, these hats also worked in locations inside Cars Land, like Flo's V8 Cafe and Luigi's. Link to the OCRegister article below:
Smart hats turn World of Color into an interactive experience | hats, hat, world - News - The Orange County Register
According to this article, there is potential for this technology to be used in future merchandise like wands! Oh, how I wish we had this cool technology when I was little.