I really like stamps! This is a easy, fast (and free) way to make them yourself.
Step 1: WHAT YOU NEED
-Wine corks (flat and smooth as possible);
-Stamp pad or ink.
Step 2: DRAW
Draw some simple things on the nicest side of the cork.
Step 3: CUT
Cut away all the outside part of the shape you drew, go few millimeter deep.
Step 4: MARK
mark the other side of your stamp with the design you made, so is easy to see what they are if you make many.
Step 5: DEEP IN INK
Deep them in ink or ink pad and stamp. Off course.
Step 6: DONE!
Make many different shapes!