Crayons bring out the creative side in everyone and encourage children to express themselves. Our dental themed 4 pack of wax crayons includes a red, green, blue and yellow crayon. A great giveaway for healthcare conventions, doctors and school programs. Ideal for daycares, charitable organizations, caregivers and more, as well. They are non-toxic, so parents and educators can rest easy. Conforms to ASTM D4236.