Also a big fan of the Yoto player, it's helped our daughter stay in her room at bedtime.

For tinkering, there's an unofficial API (WIP)[0] to interact with the player, integration with Home Assistant[1], and Yoto's sample app[2].

[0]: https://github.com/cdnninja/yoto_api

[1]: https://github.com/cdnninja/yoto_ha

[2]: https://github.com/yotoplay/yoto-sample-app