2 years & up. Bilibo's unique conic shell shape and bright colors immediately appeal to children of all ages who will intuitively create games. Developed by Zurich University's children's hospital to engage imagination and stimulate the senses and encourage creativity. Use indoors and out, right side up and upside down. Add a museum piece to your playground or even sand and water area. Color may vary. Bilibo measures 15.3"W x 15.3"H x 8.6"D .