Features: 1. Periodic Table with Real Elements Inside: Concretized learning helps children enhance the understanding and memory of the elements, an ideal teaching tool in the class. 2. Made of Acrylic: The periodic table is made of acrylic with high light transmittance, you can clearly see the elements inside. 3. Perfect Gift: Periodic table with real elements inside is the perfect gift for the science or chemistry lover in your life. 4. Wide Application: The periodic table can be used in classrooms and laboratories to provide students with professional teaching tools, making learning more interesting, and suitable as gifts for teachers and students. 5. Note: Does not contain harmful elements. Some elements exist in it as simple substances, and some elements exist in it as their stable compounds. Specification: Material: Acrylic Color: Black Size: 15 x 11.4 x 2 cm Weight: 600g Package Included: 1 x Periodic Table of Elements