18 months & up. Combine sensory discovery with early construction using Grippies® Shakers. This 30-piece magnetic building set features rods with clear windows and rattling sensory beads, plus over-molded metal ball connectors. Children explore sound and movement while connecting pieces into imaginative structures. Shaking, positioning, and building supports hand-eye coordination, fine motor development, cause-and-effect understanding, and early engineering skills. Compatible with other Grippies® sets for expanded building possibilities.