Kids as young as four can use these Crayola "Skinnies" to create colourful drawings on whiteboards, paper, and other surfaces without parents having to worry about them making a mess. The washable ink can be easily removed from the skin, and it washes out of clothing and comes off walls, carpeting, and furniture with hot soapy water. Colours in the set include red, purple, yellow, orange, green, blue, brown, and black.