over time we filled up a big blue tub with old broken crayons. some were still in tact and some were just unusable. so last night the kids and i started taking the wrappings off the old broken crayons and put them in a pile. this morning we put the broken crayons into a hello kitty cookie mold and heated them in the oven at 350 degrees for about 15 minutes. once the crayons were melted we took them out and let them rest a couple hours. they popped outta the mold perfectly. our next project will be melting various colors making them rainbow. a fun way to recycle and reuse for kids any age!