Last night, we made melted crayon rocks and checked another item off our summer 2014 bucket list. Would I recommend this craft for a 3 year old? No. But, my kids are older, so we went for it. I heated the rocks in the oven for 15 minutes at 450 degrees. Then, I transferred them to a foil covered plate. The kids loved watching the crayons melt as they touched the rocks, and, we added a few more rocks to our rock garden. We’re still going strong with our summer bucket list, click HERE to see what’s on our list.