I saw this idea on pinterest, and thought it would be fun for my son's Kindergarten class Valentines. We just have the star muffin tins to make the crayons, and we just put them with regular Valentines (that I got on clearance last year!).
The best part was my son was so excited to do his Valentines, he didn't complain about all the writing practice he was getting. :) He even made this card for his teacher:
I made these for my husband and put it in a recycled heart box. The recipe can be found here from Kraft..
I saw these cute origami heart valentines via pinterest, and made a couple for each of my boys.