Speaking of which, I was so excited to see that guitar cases are now available on Zazzle!! Matryoshka and guitars do share a shape! And these remarkable guitar case/bags have interchangeable "faces". So the entire front face can be removed and another applied. You can purchase one case with one of my cultural matryoshkas, and then other cultures to swap out. Bags are available in acoustic and electric versions. I'm in the process of offering these for all my cultures. I have drawn over one hundred cultures so it will take me some time. If you are waiting for a particular culture to be available please contact me and let me know so I can go ahead and make it available.
Romanian Guitar Case
Here is a link to a video showing how to swap out the faces (jump ahead to 2:15):
My husband is a guitarist, so no wonder this has me so excited! :)