Melissa & Doug Blendypens - Surprise Art Pattern-reveal coloring activity Includes 10 pattern-reveal coloring sheets, 12 Blendy Pens, 6 Fusion Chambers and instructions 12 Blendy Pens colors combine for 66 different 2-color combinations Use Blendy Pens markers on regular paper, too Markers and Fusion Chambers snap together for neat storage