Stella in Augmented Reality

I've been playing with some augmented reality (when you view something through a mobile device's camera and it adds something that isn't there in real life) to use in a scavenger-hunt-style library instruction activity. Today, I tried it out on Stella:

When I scan the "trigger" of Stella on my desk, the app adds the "overlay" of the speech bubble!

The library activity is more like scanning printed icons for databases and printers and other library services and resources, and getting information about them and answering questions about them, but this was more fun than that.