When I initially stumbled upon the crayon hearts, I was put off by having to purchase a heart-shaped muffin pan. It was such an easy project, and I have crayons coming out of my ears, but when I looked for pans at Michaels and on Amazon, I again couldn't justify the cost for a silly Valentine. But when I walked into Walmart on a fluke and found a silicone heart "pan" for $3.00, I made my decision to make them!
My students always start the new school year with a box of 24 crayons. About halfway through the year, they get a new box. Students are given a choice to take the old box home or to "donate" them to our classroom community crayon bucket. Luckily, I had just given out the new boxes a week or so ago and most of my students wanted to leave their old ones with me. Little did they know they were contributing to their own Valentine's Day treat.
I came home with bags and boxes of used crayons. Many of the directions I saw online mentioned buying new boxes and using those. With all the used crayons I have in my classroom, that would have been a waste.