3 ATC series - free theme

Each participant will create three ATCs that follow a common theme and together form a cohesive whole. You will then send all three to one partner. The theme is completely open.

Your ATCs will be artistic in nature (as opposed to scrap - bookish, or composed of preconceived or bought parts), although collage is fine. Try to make something that you would be excited to receive.

Newbies are welcome, although i will be checking profiles.