Its an amazing puzzle to introduce basic geometric shapes to the child in a fun under the sea theme. This one of a kind puzzle can be used in multiple ways. Concentric shapes are provided to challenge the child for shape sorting and nesting which can be used for imaginative play once the child outgrows the shape sorting stage. The chunky puzzle blocks can also be used for tracing the shapes by child to improve hand eye co-ordination and refine the motor skills.