3 years & up. These easy-fit tubes are a wonderful manipulative to use alone or add extra excitement by introducing them to the light table or sand and water table. Just add a child's imagination and their natural desire to explore and see what happens! The translucent tubes include 32 straight tubes, 32 elbow shapes, 8 T-shapes and 8 cross tubes. Stored in a sturdy, stackable container that measures 12"L x 7"W x 6"H. 80 pieces.