Markers with vibrant colors for hours of coloring and surprising effects. Thanks to their magical ink, colors instantly transform when the magic developer marker is applied, creating unique and ultra-creative drawings. A fun and interactive activity that encourages imagination and creative experimentation. Color, erase and transform your creations as if by magic. Perfect for all OMY coloring activities! Why we love them 14 bright and vibrant colors 2 magic developer markers included Colors change instantly like magic Surprising graphic and creative effects Perfect for drawing, coloring and experimenting freely The box transforms into a beautiful pencil holder