Also in advance: Make fondant-covered towers. Tint fondant: 6 oz. each red, blue, green; 2 oz. black; 4 oz. each light red, blue, green; 3 oz. each violet, orange, yellow; 2 oz. each light violet, orange, yellow. You will need: one medium tower for top green crayon; four small towers for middle yellow, orange, red and blue crayons; four large towers for bottom red, blue, green and violet crayons. For increased stability, attach dowel rods to bottom of medium and small towers. For medium tower, use a 5 in. dowel rod. For small towers, use 6 1/2 in. dowel rods. Turn towers upside down; attach dowel rods using melted candy. Refrigerate in upright position until firm. To make crayons, roll out fondant 1/8 in. thick as needed.