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Simple paper hinge. (Credit: Itoshige Studio, YouTube)

" data-large-file="https://hackaday.com/wp-content/uploads/2026/04/cardboard_hinge_box_itoshige_studio_youtube.jpg?w=625" src="https://hackaday.com/wp-content/uploads/2026/04/cardboard_hinge_box_itoshige_studio_youtube.jpg?w=400" alt="Simple paper hinge. (Credit: Itoshige Studio, YouTube)" width="400" height="400" srcset="https://hackaday.com/wp-content/uploads/2026/04/cardboard_hinge_box_itoshige_studio_youtube.jpg 816w, https://hackaday.com/wp-content/uploads/2026/04/cardboard_hinge_box_itoshige_studio_youtube.jpg?resize=250,250 250w, https://hackaday.com/wp-content/uploads/2026/04/cardboard_hinge_box_itoshige_studio_youtube.jpg?resize=400,400 400w, https://hackaday.com/wp-content/uploads/2026/04/cardboard_hinge_box_itoshige_studio_youtube.jpg?resize=625,625 625w" sizes="(max-width: 400px) 100vw, 400px"> Simple paper hinge.…