android for kids, educational app

[wesam.be]

Hi all,

my son will join the school in the next year. so i wana make it esiar for him.
what skills i need to develop educational app for primary school, for example mathematics APP, language learning APP, writing, objects matching.
i have some knowledge of programming languages such as C, C#, and a little bit Java, also i know how to use Photoshop.

is that enough to get my target ?

Regards