SNOHOMISH — A tantrum in a toy store was Kim Crane’s introduction to the gentle art of Japanese paper folding. When her mother refused to buy her an origami kit, 6-year-old Kim began tearing up the ...

Start with folding the cardstock in half vertically then horizontally to create four squares. (Dotted lines show crease lines.) Fold in the four corners to the center of the cardstock. Crease well.

If you’ve ever tried paper folding, perhaps you’ve run into a common challenge: the smaller the project, the harder it is to achieve a sharp fold. This was no issue for researchers at Seoul National ...