My roommate is obsessed with Halloween and does one of those little model villages every year with tiny spooky buildings that light up and stuff. I sometimes sculpt or 3D print parts and props for it. It’s fun to see how much joy he gets out of it, and how it grows a little each year.
It’s not great for every use case, but my ‘get this printable’ solution is Tinkercad. It’s pretty easy to use, but is correspondingly simple.