The original idea on Pinterest was to mount the crayon onto a card and use it as the valentine. I knew however that that would be a big mess. For one, the crayons don't stick very well to the cardstock (they are wax ya' know) and they would mark up anything they came in contact with, so I had to modify the way I used them.
First I punched out circles out of pink cardstock:
Using my heart hole punch, I cut out the tags and punched a hole in each one