We had an engineer from the Society for Canadian Women in Science and Technology (SCWIST) come to teach us how to make a periscope. A periscope is a tool that allows you to see things from a different angle, typically using mirrors to reflect light and show what’s above or around you. We learned how different materials affect light, including translucent materials that allow some light to pass through, opaque materials that block light completely, and transparent materials that let light pass through clearly. We also explored the law of reflection, which states that the angle at which light hits a surface is the same as the angle at which it reflects off. We had so much fun learning about how light reflects and how to use our periscopes!