Treasure Tubes feature transparent windows perfect for observing or displaying small objects for Ages 3+ Holds marbles, beads, twigs, leaves, small toys and more; accessories and natural materials sold separately Use for color and sound exploration and light table activities Flat, easy-to-remove top keeps objects secure and creates options for stacking Largest Tube measures: 3"Dia. x 5.75"H. Smallest Tube measures: 3"Dia. x 3.5"H What makes a fun noise when you shake it? Find trinkets, natural materials and sensory objects to collect in the beautiful, stackable Treasure Tubes. The round, transparent acrylic tubes with removable covers hold small objects to observe, display or rattle. Ideal for color and sound exploration and light table activities. Holds marbles, beads, twigs, leaves, small toys and more. Stack the tubes on top of each other to customize play experience. Easy-to-remove wooden top keep objects securely in place until ready to be replaced. Set of 8. Largest Tube measures: 3"Dia. x 5.75"H. Smallest Tube measures: 3"Dia. x 3.5"H. Ages 3+.