Developers feedback
And the problem is that when the kid is following the red dot with breathing instruction the screen goes off so you need something like youtube has for live interaction to keep the screen on. Thanks

Archived App
This is an archived listing of the app previously available on the App Store.This app assists children in managing their breathing rate, promoting better respiratory health and jaw development. It guides them towards controlled nasal breathing for improved well-being.
1.1
August 22, 2015
This app has been updated by Apple to display the Apple Watch app icon. iPad support now included
MoreKids Breathe Well helps children manage and control their breathing rate per minute. It promotes correct nasal breathing, which is important for improving jaw growth and development.
Kids Breathe Well is suitable for children aged 4 and above, as indicated by its age rating.
Kids Breathe Well is available for iPhone, iPad, and iPod devices.
The latest version of Kids Breathe Well is 1.1, which was released on August 22, 2015. The app was initially released on July 5, 2015.
Kids Breathe Well has a high user rating of 4.7 stars, based on 3 ratings.
The provided data does not specify if Kids Breathe Well contains advertisements. It is listed as free with no mention of ads.
Using Kids Breathe Well can lead to significant positive effects on a child's health and behavior by managing breathing frequency and promoting proper nasal breathing.