A line is an infinitely extending one-dimensional figure; one that has length but not width or thickness. In art lines are the basis that give form to a piece of art. They can be straight or curved, thick or thin, and raised or flat. Projects featuring lines: a modern art canvas with paint and masking tape; lines become three dimensional as we make a playhouse for dolls or action figures; continue with your art journal and use brightly colored pens and a special tool to make spirograph line drawings. Finally make an unbreakable stained glass plaque with foil.