3 years and up. An innovative take on the classic marble run, the Waterway Block set allows children to combine building activities with sensory exploration! While sending balls down the set's routed paths, children can begin early explorations in architectural design, physics, and other STEM concepts. The set's foam construction and water wheel make it perfect for both indoor and outdoor sensory play. Includes 15 pieces that enable multiple arrangements and building possibilities. Base measures 12"L x 12"W x .5"H.
