Thank you! The lightswitch was made mostly with cardboard, like the one at the backs of paper pads. It was painfully cut by hand using an exacto knife haha! And then I used wires from old earphones and craft beads for the rest of the details. The rest was also made of various other cheap or recycled materials.
And I don't know if I the best to answer your question about clay. I'm also just beginning with that too. But here's the info I found. There's various types, but there's three that I saw used more often which are air drying clay, polymer clay and epoxy clay.
I personally got air drying clay as it was fairly inexpensive compared to others and readily available to me. The one i got was DAS clay. It's water based and as the name implies it dries over time in contact with air as the water evaporates. You can also bake it in the oven for faster drying, but it increase the risk of cracking and small deformations.
Polymer clay, like Sculpey, cures by baking it in the oven. So it remains workable for as long as you need until it's baked. You can also add fresh clay over parts you've already baked parts so you can work over a finished section without risking ruining what you already have in place . I feel like this one is the easiest to find tutorials online as it's used a lot.
And finally, epoxy clay, which seems used more for modelling. It's a two part clay where you mix an equal part of each and the mix of the two parts makes a chemical reaction which will eventually lead to it hardening. Some can harden quite fast though, so it's something to keep in mind. I believe this one stay more flexible than the other 2 which makes it less like to break if dropped.
If you want something simple to start, you could make yourself salt dough. You just need to mix 2 parts flour, 1 part salt and 1 part water and adjust a bit the flour or water ratio whether it's too sticky or too crumbly. That's what I used to make these 2 sculptures
Like i said, I'm a beginner at this, so I hope this helps or at least give you a bit of direction on where to look!
