A slide viewer lightbox is quite easy to design. You’ll only need a few basic materials that you can find lying around in your house. This includes an inexpensive flashlight, a clean container with a cover, lightweight cardboard that is colored black on one side and white on the other, scotch tape, and a pair of scissors. The process is quite simple. Start by cutting a hole at the bottom of a small container and insert a flashlight through it. Here, the flashlight’s head should be inside the container. Then line the inside of the container with lightweight cardboard paper. Make sure that the dark side is facing outward while the light side faces inward. Finally, put the semi-transparent lid on it (like the one on margarine containers), and you’re done. Simply put the slide on top of the cover, switch on the flashlight, and view your slide.