Turn an old window into a picture frame.
Hand paint watercolor pixel art.
Stencil letters onto a thrift store painting.
Frame a fabric or wallpaper sample.
Cut circles out of poster board, spray paint, and glue onto a canvas.
Use masking tape to create a geoemetric, abstract painting.
Create string art with embroidery floss or yarn.
Use foil tape to create a wallpaper-like design on a wall.
Make your own Moroccan stenciled "wallpaper."
Hang up a scarf.