Introduce the timeless symbol of hope and promise into your classroom with Rainbow Rings™. Children will gravitate to the brightly colored rings where they can play, sit, identify colors, and participate in discussions about rainbows and our natural wonders. The Carpet and Rug Institute’s Green Label Plus® Certification is an independent test that measures VOC (Volatile Organic Compound) emissions in carpet. Carpet certified as Green Label Plus® exceeds the most stringent Indoor Air Quality standards and is best suited for living, working, and learning environments.