You've got some neat looking images there! I really like how they are simple and icon-y. How big are they? And, what do you a) carve with and b) carve on? I love your idea of mounting them on wooden spools!
I'm using Staedtler Mastercarve.
The diameter of the spool is 7/8" so all the images are smaller than that.
These are a few stamps that I worked on today. They are less than one inch by one inch. I rounded the edges to fit the small wooden spools. It will also help the rubber from crumbling. scissors, holga camera, bike, flower, cup, cassette.