There are games that are simpler and better for kids than trying to get them to slog through Monopoly or whatever.
My First Carcassonne and Sushi Go! are two we like and they're playable for adults too. (A lot of kids games are terrible, ones based on licenses like Disney or Paw Patrol for example.)
Also check out Peaceable Kingdom they make cooperative games for kids (Hoot Owl Hoot, Race to The Treasure, etc.) I haven't played them personally but based on reviews some families really enjoy them a lot.
But I actually want to know what I'm missing-- what's interesting about this "closed source but available for academic purposes" application which appears to simply be a re-implementation of existing work?
I'm trying to give benefit of the doubt here actually.