2 years & up. An upgrade from the classic nesting toy, the extremely resilient and durable pieces in the Discovery Stackers - Natural Tall Arch set enhance open-ended play indoors and outdoors. The heightened arch shapes encourage children to explore relationships in balance and organic geometry. With a gradated, nature-inspired color scheme this arched set bridges the gaps between various play patterns and brings a new life to light play. Set includes 5 solid, arched pieces and double-sided inspiration cards complete with ideas for play, relevant vocabulary, and beautiful imagery. The tallest arch measures 6.9"L x 2.8"W x 5.3"H.