12 months & up. Ideal for imaginative play. Extra-chunky jumbo star connectors are easy to connect from any direction. Stack, build, connect, twist and snap the Jumbo Star Connectors together. The jumbo-size shapes are ideal for small hands. A great set for fine motor and manipulative areas and for the young architect who is just starting to build. Easy to clean and sanitize. Includes its own container for storage. Set contains 24 pieces in 5 different colors. Each piece measures 4.75" in diameter.