My sister-in-law shared with me these crayon hearts she made with her kids on a snow day and I think they are so cute and simple. I love simple!
First you gather up all your old crayons and remove the wrappers. If you are having a hard time getting the paper off you can soak the crayon in water and it should come off easier.
Then you use a heart shaped silcone or metal pan (make sure you spray good) and fill to the top with broken crayons of all colors. If you don't have a heart shaped pan you can get one here.
Place your pan in the oven and "cook" for 12 minutes at 250 degrees, or until all crayons are melted.
Carefully remove from oven and put in freezer for 5 minutes or until set. Once cooled you should then be able to pop them out easily. These also make great gifts to include with a Valentine's card.