Wow! These are pretty cool ! Right now on Jane, you can get these Dust-Free Chalk Crayons for Only $9.99! (Reg. $15.99). They come in Color or White. They are dust-free, non-toxic, water-based, wet-erasable and safe for adults and little ones to use! No more scratchy chalk that makes you cringe. These crayons write on smooth like butter and are perfect to draw or decorate on non-porous surfaces like chalkboards, white boards, glass, mirrors, windows, tiles, metal, plastic, etc. They are so versatile, you can use them to label wine glasses, tupperware, or even mark your tires! Options for this deal include a 6 pack chalk crayons consist of Pink, Orange, Yellow, Green, Blue, Purple or 4 pack White chalk crayons only. The 4 Pack White chalk crayons are standard pen size, and the 6 pack chalk crayons are shorter in grip length. To retract or extend the chalk, simply twist the end cap for both styles of chalk crayons.