Last summer I played around with my Cuttlebug and came up with this idea to make some foam stamps. The instructions here show you how to make stamps with some detailing using the embossing folders.
Here's the 'sandwich' I used when making the stamps. The 2 B plates are not thick enough and the C is too thick, I was afraid to pass it through and break something. So I used A plate, thick chipboard, B plate, open folder, foam, B plate.
1. The folder is used open in order to get the impression on one side of the foam. (see left side of pic below) I use whichever side of the folder that is mainly the raised lines - this will deboss into your foam giving you the detail lines in my examples.
2. Cut your craft foam to fit your folder. I used self-stick craft foam. If you use this, place it on the folder side of choice with the paper backing facing up.
Keep in mind your stamp might be a reverse image (depending which side of the folder you use) so if you are using something with words you will have to use whichever side of the folder that reads correctly regardless if you get an embossed or debossed image. This will press the letters into your foam in reverse, which will read correctly when stamped.
3. Run your 'sandwich' through the CB (sandwich posted above 1 in bold).
4. Trim around your stamp. (For the combo dies that come with an embosser like the leaf, cut your shape in the cb first, then line up the foam shape to emboss.)
I used plastic from some packaging to adhere my stamps to. You can use the stamps as is and use block to press down better or put some repostionable adhesive on the back and then stick to a block.