Hi sir,
I'm Eslam, a development leader in a leading company in Egypt.
I have the experience to do this project in the perfect way in the time you need it.
Did you consider doing this application using ionic 4 and Angular ?
With Ionic, you can get an iOS application, an Android application, a standard website or Progressive Web Applications, and even a native desktop application.
Of Course we can do it only with Angular , but Ionic allows you to fast deploy it on iphone and android devices, maybe the parents would like that better to enhance the UX.
So Please consider this this suggestion, and let me know.
DO you have the design? or shall I do it ?
Hope to hear from you soon.