Make your own Stamps!!!! 

Supplies:
Craft Foam ( I get the kind that is .99 cents at Michaels . It's about 1/4 inch thick)
Colorful Cardstock to print on
A Ball Point pen for carving
Optional: Sharpie

1. Cut your cardstock to the size you want.
2. Trace your cardstock on the foam to make sure you don't make a heart bigger than the cardstock.
3. If you'd like to use your sharpie to draw your design first you can.
4. Using the pen begin tracing the sharpie lines and really pushing down. This is how you are "carving" your stamp. The lines that you are carving will end up being white.
5. Cut the heart out. Don't cut it directly on the edge. Leave a little margin around the edge of the heart as you are cutting.
6. Now you have your stamp? Press it into your stamp pad and ink it up. Then press on cardstock.

Repeat as many times as you'd like! 
And you should have enough foam to make several more stamps!!!!