It's a game in different countries, accessed via the Play Disney Parks app on your phone which causes different things to happen as you visit various places in a country. We've done it a few times and quite enjoyed it!
An example of an 'action' is in Germany when we stood near the beer steins, after following instructions on our phone the beer steins started to open and play a song. (Not sure if this still happens as we haven't visited this country with the game in a number of years.)
It's a fun way to spend time in a country and see parts you may not otherwise see.
DuckTales World Showcase
If you search
YouTube you will also find examples of people playing the game.