Here is a mind-bender for you.
This Da Vinci Ambigram is a fairly long symmetric ambigram that is useful just about anywhere.
Since it is an ambigram, this design reads 'Da Vinci' when upright and also reads 'Da Vinci' when upside-down (or is it the other way around?).
For a mental work-out, try to read it upside-down without rotating it (you can mouse over it at any time to make it spin).
For a preview of how the Da Vinci Ambigram will look on your favorite FlipScript product, use the menu bar at the top to navigate to an item and you will see the Da Vinci Ambigram everywhere! Don't forget that you can change your mind (and your design) at any time by using the 'Create New Ambigram' button on the top of every page.