Collect trinkets, natural materials and sensory objects to place in the beautiful Treasure Blocks. Smooth hardwood frames with inset, transparent acrylic windows have a removable panel to place small objects to observe or display. Ideal for colour exploration and light table activities. Holds marbles, beads, twigs, leaves, small toys and more. 2 screws on the removable panel keep objects securely in place until ready to be replaced. Largest block measures 14cm long.