Give the gift of beautiful design this holiday season with these modern holiday gift ideas, from glassware and decor to games and speakers.

Forms make up a variety of things in the real world, including sculptures, architecture, and other three-dimensional objects.

Shapes fall into two distinct categories: geometric (or regular) and organic (where the shapes are more free form).

In the example below, lines have been used to create a flow chart that guides the reader’s eye from one element to the next.

A line is a shape that connects two or more points. It can be fat, thin, wavy, or jagged—the list goes on. Every possibility gives the line a slightly different feel.