This was so much fun to do because you get to make something that can be quite fun to play with and functional. I love the practice "dot" images the site provides. I was lazy and made one side of my glasses red and the other blue (with clear plastic and a blue "Sharpie") so I didn't have to make two pairs. In doing that I accidentally created some 3-D glasses and you can too! Here are some cool images and a video to look at with your new 3-D glasses!
Saturn's Rings: https://images.app.goo.gl/XEr5kv1y7jpiqoR5A
Roller Coaster Video: 3D Rollercoaster: Falcon (3D Glasses needed) (No Limits Simulator)