This looks amazing. Several times in the last couple of decades, as graphics and physics engines have evolved, I've built little prototypes whose main goal was "this should work using real physics and mechanics", and then built things like marble machines. Games like Crayon Physics always felt so limiting; they were only about things bouncing off each other. I'd like gears that turn and mesh, light that diffracts, mo…
I think what you're looking for is a "shed". It's a space in the real world where all the usual physics apply and you can make things using them. ;) All jokes aside, this sandbox looks awesome and I want to play with it more. :)
In the blink of an eye, you'll have old lawnmower blades (for when I start forging), a full shelf of two stroke engines (shame to throw them away, when they almost run), at least 3 power tools that have been used a total of once (but they were on sale), a "random fasteners" drawer, and an entire woodworking area. *
* Woodworking area may only exist in your mind if you're younger than 50.