An online game where children can choose characters and go on an adventure.

They could encounter social "challenges" such as bullying and need to help someone in order to proceed.

There could also be different options within the game (games within the game) to memorise scripture, or Journey with Jesus and learn about bible stories along the way while collecting items or completing tasks. 

By making it a journey, children could "level up" as they complete different aspects, gain new character costumes/confidence/skills, so they are ready to take on more challenging tasks (more complex social encounters, longer bible passages). 

There could be ways to connect children through the game (keeping safety as a priority), such as having to work together to complete tasks, or by sharing their completed task "tokens/badges" on social media. 

I don't personally play online games, so sorry for the language barrier!