Giddy Up Mega Blendy El Grande Kit Activity kit includes 12 Original Blendy Pens, 12 Magic Color-Change Blendy Pens, 10 Mini Blendy Pens, detail pen, 17 Fusion Chambers, 10 large Surprise Art posters, 10 small Surprise Art posters and instructions Blendy Pens posters feature hidden patterns that appear when colored 1,000s of color combinations Fusion Chambers feature peer-in windows for previewing color blends Magic Blendy Pens come with color-change activator to draw on brilliant contrast