These kind of home made stamps are so quick and easy to do. Cynthia showed us how at a workshop earlier this winter. It is all made with self-stick foam that you can buy in any craft section. I used cardboard and foam core for the the back supports.
When you consider the cost of manufactured stamps these are so inexpensive!!! And I think more fun.
Today I used black acrylic craft paint and stamped on white tissue paper. Jane Davies has a whole section in her collage book on how having black shapes on tissue is so handy to be able to cut up and use anywhere you want. When applied with acrylic mat medium the paper become transparent and disappears almost like magic.
I like the handmade...slightly imperfect stamps as they add interesting "wabi sabi" to art.