Sure, it's a studio, I have microphones and digital recording interfaces, but I keep all that stuff in an old armoire; mostly my studio is all about being inspirational.
One of my favorite places in the world is the campus at UCSD. One of the reasons I love it so much is because they have so many things there simply because they're thought-provoking - things like talking trees and teddy bears made out of boulders, they designed the whole place to elicit lofty thinking, which of course makes sense in that it's an institution of higher learning.
I built my studio based on that same philosophy. It's a place to inpire my thoughts and imagination, to record my performances, and to give me a good place to pace while I'm thinking.
Because it's supposed to inspire my thoughts, I'm all the time adding things to my collection of artifacts.
My latest addition is a display of two velociraptor skeletons, locked in combat. Unlike Jay Walker, I don't have a real raptor skeleton, mine are plywood 3-D models. I placed them on a shelf above the door and illuminated them with LED Christmas lights. I think they're pretty cool.