Truly - for youngsters - most have such flexible minds as to adapt to anything - so even straight Ubuntu is usually an easy thing for them to get into...UNLESS: If they've been exposed to the classic (pre-XP) weendoze, some may prefer that older type of desktop, in which case Ubuntu Mate is very easy to slip into their repertoire. There are also quite literally distros aimed at kids usages - but none of their names come to mind for me right now as I've given scant attention to those - just read a few reviews of them every so often. A quick search on "linux for kids" brought loads of results - there are a bunch of older posts mentioned in those results so I would suggest being alert for those which are fairly recent...also tried searching thusly: "kids siteistrowatch.com" (Tried making this correct but the site insists that : + d MUST be a smiley, sorry !!) But those results were uninspiring. Good Luck & Best Wishes !!