These Giotto Decor Materials Felt Pens, in 6 colors, were specifically developed for writing and decorating unconventional surfaces such as plastic, metal, glass, or ceramic, in addition to traditional paper. Ideal for artistic expression projects involving diverse materials, these pens from Giotto's Decor line expand creative possibilities beyond drawing on paper. A versatile choice for school or art projects that require writing or decorating on specific everyday surfaces.