This is a detachable periscope model, made of wood material and fine craftsmanship, which is safe and convenient for kids DIY assemble. Kids can rotate to different angles to see things,Multi-use design, this toy can be used in laboratory or physics classroom for recreation and teaching. Features -Color:Light Yellow -Material:Wood -Size:18.00X7.00X3.70cm/7.07X2.75X1.45in - 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. - This Kids Periscope 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: 4 x Sets of Wood DIY Periscope