Lately I have been really excited about the idea of buying a few animal tapestries and scattering them through the house. I would then build the room around the tapestry for example a lion tapestry might have an African Savannah style theme.
I have decided to go for an ocean theme after finding this post on awesome turtle tapestries. I particularly like first tapestry on the page and I plan to buy it to place on the backwall. I will then place ocean ornaments around the room and may even paint it blue!