Mess Free Colouring - won't colour on skin, furniture or fabric! Colours magically appear only on Color Wonder paper Nontoxic Explore the wonder of colour using Crayola Mess-Free Color Wonder. Color Wonder is a mess- free creative system of inks and paints, developed by Crayola scientists. Color Wonder inks and paints are clear, and colours appear only on the special Color Wonder paper. Kids love to watch the colours magically appear, and moms love the fact that Color Wonder inks and paints will not appear on skin, walls or carpet.