Next, make holes for the birds to feed through. Sketch out 3-4 holes with a marker ... then double it by folding, and then cut your doubled length of string. Folding your piece of string in ...

Using a fold-and-cut process, what shapes can you produce? Remarkably, it turns out that, after an appropriate sequence of folds, any straight-line drawing (polygonal shape) can be cut out of one ...