These Clear Treasure Tubes feature transparent windows that are perfect for observing or displaying small objects.Hold marbles, beads, twigs, leaves, small toys and more. Use for colour and sound exploration and light table activities. Flat, easy-to-remove top keeps objects secure and creates options for stacking. Largest Tube measures: 7cm Diameter x 14.5cm in Height. Smallest Tube measures: 7cm Diameter x 8cm in Height. Age Suitability: 3 Years +