This kinda reminds me of the Ribbitribbit saga in Everquest 2, the kid of similar age, had a similar terminal desease and he absolutely loved EQ2, he had a froglok avatar [https://www.everquest2.com/images/en/features/2013/03/ribbitribbit/ribbitribbit1.jpg] and his parents asked the community to help them make something truly special for him and boy they did, they built him an entire theme park* just for him and he absolutely loved it, he passed away a few weeks later, but he's still remembered, as he has his very own day in the game, to celebrate the awesomeness of the community and of course, the kid himself.
[small]*Inside the game itself of course.[/small]
EDIT: I already cried a few years ago for that kid and thinking about it again and this story too... just brings me tears again, just the thought of burying my own child if I ever have one someday, just... *sniff* Excuse me...