Manufactured with plastic materials, this periscope can serve us for a long time. This periscope can be detachable, which is convenient to store and carry. This is the holiday gift to buy for children and can stimulate their imagination. It can make child to experience the fun in the process of scientific experiments. Features -Color: Black. -Material: Plastic. -Size: About 30.00X6.00X4.50cm/11.79X2.36X1.77in. - Not only as physical model to explore the mysteries of physics, but also as educational toys. - This periscope is an excellent physics experiment optical reflection school teaching tool - As the optics physical model to let students learn optical reflection principle in interesting experiments - It can be used for the education of optical experiments to let children learn more about science - With our periscope, through experiments, it is easier for children to understand light reflection Package list: 1 x periscope model