Een zwerm koeien is a Dutch story for children written by  Andries Wijnker.

Marzj made a live storytelling play out of it told by storyteller Peter Dupont.

Marzj wrote the music for it, and created illustrations and animations as well.

Also there is an audiobook available in the online streaming stores like Spotify .

You can read and listen to the interactive ebook here (only in Dutch).