From the Crayola Project line, Gel Crayons offer rich, super smooth colours for art projects, homework assignments, and crafts. No sharpening required, just twist up to colour, and twist down to protect the colour core in the durable plastic casing. This set of 5 Gel Crayons is great for light and dark surfaces. Works on poster board, foam board, regular paper, and construction paper. Recommended for ages 6 and up.