YouTube Kids Issue

Hi all,
I have recently downloaded YouTube Kids app to save myself much noise my little ones make. Maybe a 30/60 minutes on the app everyday may help me keep my insanity. When I open the app, a background music is played and even when I play my little ones a cartoon or something it keeps playing. It just stops if I activate Voiceover, when it is off the background music is on once VoiceOver is running it automatically stops. I could not find anything in the settings of this to disable background music and could not find any connection why the background music keeps playing while VO is off and stops if VO is active. This is on iPhone 5.
Thank you.