IDO3D GO 4 pen set (pen color Purple, Green, White and Pink) Use the guide map and 3D building accessories included to create one of the amazing IDO3D GO! projects. Then bring your project to life by connecting the parts to the specified windup mechanism included in your IDO3D GO! set. Wind it up and watch it GO! IDO3D uses a cool blue LED light and soft, squeezable 3D pens that enable you to easily draw 3D objects! The IDO3D Vertical light attaches to each pen by clicking firmly into place.The light can easily be removed from one pen, and placed on another by simply pulling it off, and popping it onto another. It's a snap! With IDO3D GO!, you can draw vertically, straight into the air. To do so, turn on your light, and simply draw upward by squeezing your pen and moving the tip vertically, away from your drawing surface. You can also make solid sheets of material by drawing on flat or curved surfaces, first with the light off, and curing afterward by shining the light on your art. Draw on non-sticky textured materials or objects like coins or buttons, and then remove for very cool effects. Fun! IDO3D is easy to clean from your hands and work area with baby wipes, hand sanitizer and every day soaps and cleaners.