I wanted to use shamrocks on an upcoming project, but I needed a lot of them and didn't want to hand paint every one. So I decided to make my own stamp, I wanted them little anyhow so I just used a pencil eraser. Here's how:
Supplies: Pencil, Marker, Craft Knife
1. Draw a shamrock onto your eraser.
2. With your craft knife, cut away everything except for where you've marked it. Don't cut yourself. ;)
3. Ink or paint your eraser and get to stamping! I think it turned out pretty great and this is a great alternative to stamp carving if you just want something simple and easy.