This set of 100 Ring-O-Links is made of sturdy plastic with chunky pieces that are easy for small hands to grasp. Vibrant colors make these first manipulatives perfect for building, counting, sorting and classifying too! Construction sets also aid in the development of finger dexterity and fine motor skills. Prevent lost pieces by storing your pieces in the handy storage bucket that is also perfect for travel. Ages 3 and up.