Children can collect and closely observe natural materials, special treasures, and interesting specimens. A completely clear container and a magnifying top enhance possibilities for scientific discovery and nature-based exploration. Use this set of stacking, easy-to-clean containers during experimentation with wet and dry materials. Small container measures 8cm H x 13cm W (3" H x 5" W), larger container measures 13cm H x 13cm W (5" H x 5" W).