Here is an experiment with making a hand shaped stamp.
Here is yet another stamp. This one was made with the kind of foam that can be heated and pressed into (or onto) another form. The great part of using this foam is that it can be reheated to lose the image and reused for another image. This particular stamp was made by pressing the heated foam into a copper food mold.
The ouside of the copper mold was used in this image.
This stamp came from pressing the heated foam into the inside of the copper mold.