Raduga Grez Skin Tones White and Black Arc StackerArch stackers of different skin tones may be a perfect cause to talk with your child. Although the details are painted in different hues they all are similar and equal, and made of the same material. People may have different colors of skin, eyes or eye cuts, hair, beliefs or sweethearts, but we all have red blood in our veins and our hearts beat in the same rhythm. It is more than just a simple stacker it plants the ideas of equality and importance