I've had an idea in my mind for a while now. If I ever find the time, I would setup an environment that looks kind of like a lab with cardboard and paint.
I would have a main computer running a simulation and a flat touchscreen on a table where I can interact with the simulation.
I would have a few separate tables with different simulation processes running.
I would then have some physical tools (eyedropper sort of) where I could take some entities in the simulation and drop them into other simulations in real time, or store them in virtual vials (physical, but with small storage space for saves or having small simulation running on raspberry pi or something).
It would basically feel like a fun little lab. Maybe even a little microscope to make it feel cooler.