Neat. I wonder if the files are stored on that card (and if yes, how) or if it works like the Toniebox where you have some kind of token that triggers a network download.

EDIT: this Reddit thread says it downloads the files. "All the audio files live in the cloud and it gets downloaded to your Yoto when you insert a card in the speaker. This means that you will need WiFi the first time you listen to a card, but should be fine without the next time you want to play the same."

https://www.reddit.com/r/YotoPlayer/comments/1grrl9u/just_le...

The cards have an NFC chip: https://support.yotoplay.com/en-US/what-are-yoto-cards-made-...