Hot Rock Melted Crayon Art

melted crayon on rocks art project for kids

I have wanted to do this melted crayon art project for ages. I did these decades ago in a day camp but never felt my kids were ready for this activity until now.  This is not something I would try in a busy class because you need to be able to really watch the kids 100% of the time. I changed a few things from how I did it years ago to make it a little safer for my kids as well. The first one was to place the rocks in individual bowls. The bowls were safe to touch to move the rock and stopped my kids from reaching for the rock to move it. I also didn’t peel all the paper off the crayons so that there was a “safe section” to hold onto and if they got down to that part they knew to switch and get a new crayon.

This was a very fun and dynamic art activity and I hope that even if your kids aren’t ready to try it yet that you will save it for when they are!

 

Gather your materials. You will need some medium sized rocks, foil, crayons, a cookie sheet, oven, and as many little bowls as you have rocks. I also lined our work area with an old tablecloth and more foil.

crayon melting art

Start by washing your rocks and warming your oven to 250. I popped the rocks on a cookie sheet lined with foil and into the oven right away not waiting for the oven to get to full temp.

hot rock and crayon experiment

While they were in the oven I lined the bowls with foil. I also placed an old tablecloth and foil under our work area.

hot rocks summer art project for kids

I also peeled most of the paper off a bunch of crayons. Leaving a handle on each. This was the safe spot for the kids to handle the crayon.

hot rocks crayon art

Once the buzzer on my oven indicated that the temp was reached I took the rocks out. They are HOT mine didn’t get hot enough to burn but I can’t guarantee yours won’t, PLEASE DO NOT LET KIDS HANDLE THEM EVEN WITH OVEN MITTS. Have an adult wearing oven mitts place them in the bowls. Wait until you are certain that the rocks will feel very warm but NOT burn before you invite the kids to come create. Test EVERY rock not just one, they may heat unevenly.

hot rocks art project for summer camp

Start creating. They were both amazed at how quickly they melted. melted crayon on hot rocks activity for kids

They LOVED it and they were very careful too. melted crayon art for kidsI was worried I wouldn’t be able to get photos – and I didn’t get as many as usual but they were so conscientious about the safety and rules I had laid out for them. If only this ability extended to water flights in the yard… crayon art with hot rocks for kids

The colors mixed and twirled together and were so shiny! melted crayon activity craft for kids

Let them cool completely. We placed ours in our garden for decoration. hot crayon rock craft