Features: Discover the fascinating world of optics with the Educational Periscope Toy, designed to help student visually grasp optical principles and stimulate their interest in science. Crafted from ABS and glass, this detachable periscope is safe, and easy to assemble with modern educational philosophies, ensuring sustainable learning experience. Suitable for school physics teachers, students, and beginner interested in optics. Widely used for classroom teaching, extracurricular experiment, and homeschooling science activity, this kids educational science toy enhances the learning experience by making education fun and interactive. Portable Periscope Toy is engaging assembly toy that combines learning and play, making it excellent addition to any educational toolkit. Specifications: Color: Black; Component: ABS; Glass Size: Approx. 29.5x6cm/11.61x2.36in Weight: Approx. 146g Package Includes: 1Piece Rotating Periscope note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color