Turn off background animation
To be this is not just a feature, this is a bug. It is an easy fix (you just need to figure out where to put the setting, I am sure you have some ideas about where)
This animations are severely distracting my daughter and removes the fun for her learning (this is not a game application, it is a learning application)
Apple, I am sure probably has some guidelines around the topic for people with attention difficulties. In the iOS device settings one can turn off certain animations because of this.