Melissa & Doug Blendy Pen - Mega Giant Blendy Pens set with color-reveal pictures, Magic Blendy Pens, and 300+ possible color combinations 18 Blendy Pens, 11 Magic Blendy Pens, 1 Activator Pen, 15 Fusion Chambers, instructions Includes 20 Surprise-Art Coloring Sheets: 10 large (8in x 10in / 20.3cm x 25.4cm) and 10 small (4in x 5in / 10.2cm x 12.7cm) Magic Blendy Pens mix and blend . . . then change colors on the page when you add the Activator Pen Use Blendy Pens markers on regular paper, too