Communication App for Non-Verbal Children

I'm looking for an app that aids communication for non-verbal children through engaging games. The app should be available on both iOS and Android platforms.

Key Features:
- A Picture Exchange System: This primary feature will help facilitate communication. It should be intuitive, accessible, and engaging for children.
- Games: The app should incorporate matching games, puzzle games, and interactive storytelling. These games should not only be entertaining but also promote communication and interaction.

Ideal Skills and Experience:
- Proficiency in iOS and Android app development
- Experience in creating child-friendly applications
- Understanding of Picture Exchange Communication System (PECS)
- Game development experience, particularly in creating matching games, puzzle games, and interactive storytelling.