Interesting stuff, thanks for sharing!
I worked on a similar project where they wanted to teach kids how to save. Definitely stressed me out because I didn't know the first thing about designing for kids either. One of the challenges I had were really nailing down the age range we wanted to target—someone who's 12-16 years old won't learn or find things engaging the same way that 5-8 year old kids would, so to say that a persona of 5-16 years might be too broad.
- Things like material design are aesthetically pleasing for us, but that doesn't necessarily mean that it's engaging for them. Same with immersive audio; we're not interested in hearing sounds every time we click/tap a button, but kids enjoy it (and it helps them with cognitive understanding).
I found this after finishing my project (naturally): http://www.bbc.co.uk/gel/guidelines/how-to-design-for-children
Maybe you'll get a kick out of it.
Thank you so much for the read.
I also did face the challenge of defining kids for persona purposes. 5-8 years old are completely different from 12-16 ones.
You may want to check the case study of youtube for kids by Hellomonday. http://hellomonday.com/youtube-kids