Shake, rattle and roll! Intertwining hard plastic rings are filled with small, colorful beads to provide visual and auditory feedback. Improves motor planning, fine motor skills, and hand-to-eye coordination. Captivating rings engage the child and teach both problem-solving and cause-and-effect. Two sizes available: double rings are recommended for ages 4 to 18 months, triple rings are recommended for ages 12 to 36 months. Teething-safe. PVC and latex-free.