Ooooh, these are so cute. For someone like me who cannot cut a decent heart, using my thumbprint is a great idea. Karen's tutorial is really well-detailed. She explains clearly, in text and in photos, how to keep the surface smooth while you are printing the hearts. She also show two different ways you can place the thumbprints to create a different look each time. This is probably the most unique way of making a well-shaped heart that I've ever seen. The post and tutorial is over at…