Honestly, I think the simplest order for children is probably:
- The OT uninterrupted
- The PT uninterrupted
- Solo? The Clone Wars?
- The ST uninterrupted
This is for children who have remained oblivious to the Vader twist, and are likely too young to handle R1. For adults just do it chronologically. I don’t think adding tons of backstories is a good idea because it may become confusing for first-timers. Although it would make an interesting marathon watch.