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A boy in my class a couple years ago gave these as little Valentines made out of melted crayons. He said, "For Crayon Out Loud, Happy Valentine's Day"... could also say, "You COLOR my world!" Use silicone cups to melt them in. baha love it<--- so cute, I have to remember this for dusty!!
Melt crayons in cool shapes: melt au bain marie in an old can, then pour into mould, let cool
If you have not done this yet, you need to. Simply warm up the rocks in the oven (I did 220 for 10 minutes), then put them on a stack of newspapers (or something else you don't care if it gets crayon in it) and let the little ones go to town. Just remind them it is hot. I have done it with 2 1/2 year olds with no problem. My little lady often brings in rocks for me to "cook" so she can paint them
Sun Melted recycled crayons ~ I am going to try using the cookie cutters in the oven instead of a mold. I have tons of cookie cutters. On the next hot day I will try using solar power to do the melting!