Crayola colour Explosion Extreme Surprises lets you create wild multicoloured effects with a single colour Explosion reveal marker! The unique clear ink marker works only with black colour Explosion paper, revealing hidden colours for amazing designs. Start drawing and watch surprising colours appear on the page! Includes 18 page perforated spiral bound book, 2 colour Explosion Markers and Stencil Sheet to add detail. Ages: 6+ years.