You may, at some point, have occasion to one of the many Disneylands in the world. And if you do, you may go with your family. Sure, you could make up personalized T-shirts to identify each other in the rough and tumble world of Main Street, USA. Or you could make your own hats with Mickey Mouse ears with Neopixels that sync with other hats nearby. Here’s more from Element 14:
These light-up Mickey Mouse Ears show Neopixel animations and sync with other ear hats nearby, for the ultimate Disney group attire! The sync is made possible using the micro:bit’s internal radio to broadcast different animation modes. We designed animations to match different attractions across the park, so we could really get into the theme of each ride.