The Möbius strip has several curious properties. A line drawn starting from the seam down the middle will meet back at the seam but at the "other side". If continued the line will meet the starting point and will be double the length of the original strip. This single continuous curve demonstrates that the Möbius strip has only one boundary.
This is not really a mobius strip but a pool toy about the size of a large cantaloupe. I snapped it with the Hipstamatic app on my iPad and then posterized in Picnik. I threw in the comparison to a mobius strip because I do like to give you all something to ponder. Actually it looks more like a balloon sculpture.