The Discovery Stackers with extremely resilient and durable pieces enhance open-ended play indoors and outdoors. The heightened arch shapes encourage children to explore relationships in balance and organic geometry. This arched set bridges the gaps between various play patterns and brings a new life to light play. A set includes 5 solid, arched pieces and double-sided inspiration cards. The tallest arch measures 16cm L x 7cm W x 13cm H (7" L x 2-3/4" W x 5-1/4" H).