The Fisher Price Sensory Rock-A-Stack Toddler Ring Stacking Toy is designed for children 6 months and older. It features a sensory design to engage young minds and help with their development. Made by Fisher Price, a well-known brand in the toy industry, this stacking toy offers a fun and educational way for toddlers to improve their motor skills and hand-eye coordination. The toy includes one piece and is intended for young children to stack and play with.