Giddy-Up Blendy Pens 72 Piece Mega Kit The Kit includes: 24 Blendy Pens, 12 Fuzion Chambers, 30 Postesrs, 2 Sticker Sheets, 2 Sticker Backgrounds and 2 Idea Booklets. A non-toxic and washable art project for your kids Blendy Pens allows kids to fuse the markers together to create different color blends. Blendy Pens works by inserting 2 Blendy Pens into the Fusion Chamber and twisting, and then you've created Color Fusion! In real life colors blen... so your markers should too! Mess Free - Ink dries almost instantly so you wont have to worry about messy stains.