Or download our app "Guided Lessons by Education.com" on your device's app store.
Make a Pinhole Projector!
Take a look around you. Everything appears right side up. Although this makes sense, it's not how your eye sees it. Images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. It takes a learned brain trick to flip these images right side up so that they match the look of the real world.