Chalk-O-Rama Dustless Chalk Crayons eliminate all of the pesky mess of traditional chalk. Never ask how to remove crayon from a chalkboard again! Shop OOLY. Chalk Sticks that Write Work on Many Surfaces Feels Like a Waxy Crayon Permanent on Porous Surfaces Wipes Off Easily on Non-Porous Surfaces Encased in Plastic Barrels with Twist Up Action Set of 12 Suitable for Children 3 and Up