The HubbleClub cameras offer you a set of built-in lullabies and audiobooks. You can access them with a tap on the music note icon under the live streaming. You can select any of the lullabies using either the play, skip next and skip back buttons or the playlist icon.
You can also add more lullabies as well as audiobooks, and even your own recordings.
Please note that if you have a HubbleClub plan, only 10 lullabies and 8 audiobooks are available, and you can record your own recording up to the 1-minute length.
If you have HubbleClub Premium Plan, you will enjoy a set of 48 lullabies and 30 audiobooks each and 2.5 minutes of your personal recordings.