Hiya Fennet,
Becoming a child avatar for me was more years of watching over child avatars wandering around hair stores, clothing stores, doing hunts and I couldn't help but go awwwww! at them lol. I learnt a little more about child avatars and family RP really from one I met very briefly a long time ago while doing a SL hunt, she was struggling with finding a item and I helped her, after that I kinda asked her a few questions about being a kid avi. Once I got over trying too understand the ickle speak lol I found what she did quite interesting and intriguing. I've since forgotten her name but she's one of the reasons I decided too give it a go, may have taken me a year lol but I got there eventually.
Animations I've actually got a full ao bits and pieces I bought from the store owned by daiz Papp, my adult avi has a AO from there so I'd seen some of the kid ao's before. I'd love of course suggestions for posing animations, moment I've got a few I found on Marketplace and I'll maybe buy some from Glitterati too.
Even on a adult avi I didn't do a lot, i shopped, hung at beaches, went dancing, shopped some more. I never really was one for exploring, low attention span I got bored easy. I'd love too meet up with you though, I have one friend inworld so far that I've talked too once, I'm finding that a lot of kid avi's seem too be in kinda cliches, not very approachable.
You should definitely check out OSE then, it's a elementary school in SL and it seems too be very very popular. Ocean Side Elementary and Hardknock I'm learning are the most popular schools in SL for kids.