Use this creatively shaped chalk on any chalk friendly surface to create unique marks and doodles. "Thanks to their curly and interlocking shape, you can double 'em up to draw with two of its twelve colors at once. Or, if you're more of a minimalist, keep it simple with a single bean." Made from 100% chalk, it is non-toxic and it easily washes off any surface. From Areaware. Sold as a set of 12 chalk pieces in a box. Each piece measures 1.5 x 2.2 x 0.8 inches.