Crayola Nontoxic Chalk Assorted Colors 12 Sticks Per Box (510816)
CRAYOLA-Colored Chalk. Crayola chalkboard chalk is strong and less likely to break. Each stick provides consistent color throughout the stick. This package contains twelve 3 inch sticks of chalkboard ...
Pros: The chalk is really cheap
Cons: It breaks scratches the chalkboard