Using Current Project as GameObject in New Project

Hello, I’m currently trying to make simulations of tools and machines in Unity so that I can make a serious game that will test users on how to use the tools being simulated. I was curious as to whether anyone had an idea on how I would essentially implement each of the individual tools (they’re each their own separate project) and create functioning GameObjects with them in a final, larger game.

I’ve been trying to look through the internet for an answer but I’m unsure on how to phrase this question. Could anyone tell me if this is possible or if they’ve possibly had luck doing the same thing?

Sounds like you need to learn about prefabs, which are the core reusable building blocks of any Unity project: Essential Unity Concepts - Unity Learn