I've been doing a lot of stamp carving lately and as a consequence, I've got lots of leftover rubber scraps. I hate to waste it, so I make "trash" stamps: random little designs on the leftover scraps. The first stamp.
Rubber Stamp Carving - Happiness is Homemade
Tampons cactus / Cactus stamps by Andrea Lauren
Some New Garbage Stamps (Balzer Designs Handmade Art)