The Cut-Out Fraction Circles is designed to serve as a sensory aid for children to enhance their concentration, hand-eye coordination ability and fine motor skills by putting the fractions together like a puzzle trying to form the correspondent whole or even mixing the single fractions and putting a colorful whole together. They can also create figures with the loose fractions mixing up the colors or simply putting them together to form new patterns! The set is made of natural Beechwood, containing no harmful substances, with smooth surface, no burr and edges, which are comfortable to touch. They are also sturdy and not easy to break.