Valentines Day Cards

So this year I am making valentines day cards instead of buying them for Noahs preschool class. We have several unused crayons in our house that are broken or mangled so I was on www.familyfun.com and came up with the idea of melting crayons (broken) into some heart shaped trays (ice cube trays from Target for $2.50/2pk) and got this. . . .