Hollow 2 — Original & Authentic

: Research exists for "rewritable paper" using hollow SiO2cap S i cap O sub 2

: You can follow step-by-step visual guides on Instagram or Facebook to fold modular origami into hollow cubes or squares. Hollow 2

particles , which allows for reversible printing using water as "ink". : Research exists for "rewritable paper" using hollow

: For a more "secret compartment" style, you can learn to hollow out a stack of paper using magnets and cutouts to hide items inside. Hollow Knight Inspired Crafts Hollow 2

If you want to physically generate a hollow object out of paper, there are several popular guides:

: There are even specific guides for folding a Hollow Knight head using a 16x16 grid. Scientific & Creative Contexts