Roblox will not work. The developers are actively preventing it from working in Linux.
Those other games should. If you don’t mind to tinker a bit to make sure they’re set up properly, then your son should be able to just launch them from Bottles or Lutris or whatever you set up as a games launcher.
I don’t know about Sims. I have a pirated copy of Sims 3 working just fine though.
And likely this doesn’t either. It’s probably “technically playable”.