Just peel the crayons, break them into pieces, and group them by color families in the molds (no need to use a cooking spray if you have a freezer). Preheat the oven to 200 degrees and place pan in oven for 15 minutes. The silicone candy mold will need a baking sheet under it to keep it flat. Check at about 10 minutes to make sure you have enough broken crayons in the mold, if not, add more. The silicone molds take longer to heat the crayons to melting point. When, melted, turn off oven and open door. Let the crayons cool until set around the edges, then cool on the counter until set (I put mine outside). When set, put tray in freezer until cold. The crayons will slide right out of the pan or pop out of the silicone molds. Look for inexpensive silicone molds at a dollar store and use only quality, non-toxic crayons. The silicone may absorb some of the dye from the crayons so don't use a borrowed tray. And you will need a fair amount of crayons. The box in the right picture was filled.
For the playdough, plain inexpensive bleached flour, salt, and a light colored cooking oil will make the most vibrant colors but you may want to have some extra liquid food coloring on hand.
Kool-Aid® Playdough
1 cup flour1 package unsweetened Kool-Aid®
1/4 cup salt
2 tablespoons cream of tartar
1 cup hot water
1 tablespoon vegetable oil
Mix flour, salt, cream of tartar, and Kool-Aid® together well with a fork in a medium pan. Add hot water and oil. Stir over medium-low heat 3 to 5 minutes. When mixture forms a ball in the pan, remove. Knead until smooth. Put in a plastic bag and refrigerate. Dough is smooth, non-sticky, and smells nice.
Mix flour, salt, cream of tartar, and Kool-Aid® together well with a fork in a medium pan. Add hot water and oil. Stir over medium-low heat 3 to 5 minutes. When mixture forms a ball in the pan, remove. Knead until smooth. Put in a plastic bag and refrigerate. Dough is smooth, non-sticky, and smells nice.