Hey there, DIY enthusiasts! Want to impress your friends with a cool 3D viewer that you made yourself? Look no further, because we've got a step-by-step guide to help you create your own 3D viewer. Here's what you'll need: - Cardboard or sturdy plastic - Scissors - Ruler - Pen or pencil - Clear plastic or glass - Smartphone Let's get started! Step 1: Cut out two identical rectangles from your chosen material, each measuring 8cm by 4cm. These will be the main frame of your 3D viewer. Step 2: Using your ruler, carefully mark and cut out a rectangular viewing window in the center of one of the rectangles. Make sure it's large enough to comfortably fit your smartphone screen. Step 3: Trace the outline of your smartphone on the opposite side of the same rectangle, and cut out a slot that's slightly smaller than the traced outline. This slot will hold your smartphone in place. Step 4: Attach the two rectangles together along their longer edges, creating a 90-degree angle between them. Step 5: Cut out a rectangular piece of clear plastic or glass that's slightly larger than the viewing window, and attach it securely over the window. Step 6: Your 3D viewer is almost ready! Simply slide your smartphone into the slot, ensuring that the screen is aligned with the viewing window. Step 7: Now, it's time to find some 3D content to view. There are plenty of 3D images and videos available online, so take your pick and start exploring! Remember to adjust the positioning of your smartphone to achieve the best 3D effect. Congratulations, you've just made your very own 3D viewer! Show it off to your friends and family, and let them marvel at your DIY skills. Who knows, you might even inspire them to create their own 3D viewers. Have fun and happy viewing!