I really like this idea for a hexagon stamp from Wild Olive . The design has a pattern of stitching around the edge so you can stamp a quilt design.
Image from Wild Olive
After seeing the hexagon stamp I had a look for some more ideas for making your own stamps and came across Geninne’s Art Blog with a whole section of tutorials and advice for making your own stamps. These little flowers she has made look so lovely.
Image from Geninne’s Art Blog