There are tons of ways you can build 3D models - of pretty much anything - using online software. Wanna build a building? You can do it! Want to make a prototype for something you want to build?
You can do it. Some of these sites cost a bit of money, like Tinkercad, but you'll find plenty of free options by a simply Google search. And of course, there's The Sims, if you feel like building an entire city and getting really involved. Me, I just like to design floorplans of my dream house, haha.
3D model building
“I just like to design floorplans of my dream house.”