Manufactured with plastic materials this periscope is sturdy and reliable, can serve us for a long time. This periscope is easy to assemble and can be detachable easily, which is convenient for you to store and carry. You can buy it for children and can stimulate their imagination. Features -Color:Black -Material:Plastic -Size:18.30X6.00X3.20cm/7.19X2.36X1.26in - Made of plastic, strong and practical, to use. Great toy for teens to play with. Periscope is an optical instrument that uses the principle of light reflection so this simple periscope can be as the teaching tool. - The periscope with detachable and splicing design is convenient to carry and store. - Suitable for children to experience the fun of optics physical experiment in the process of playing this fun gadget. - Put education in fun, cultivate scientific knowledge. Perfect for any school, or home use. Package list: 1 x Kids Periscope