There is a very nice coupon for Crayola Color Wonder items available. There are a ton of great items to mix and match just make sure you get over $10 worth of Crayola products.
Buy at least $10 worth of Crayola Color Wonder products
Use the printable coupon for a FREE Crayola Color Wonder refill WYB $10 worth of Crayola products
Final: FREE refill WYB $10 worth of Crayola products