Magic Square Tetraflexagon

When put on a square tetraflexagon, all the rows, columns and major diagonals in the following magic square sum to 34. You can "flex" the flexagon to rearrange the magic square in four different ways. Even though each flex swaps around the rows, columns, and diagonals, they still continue to sum to 34.

To see this magic square tetraflexagon in action, watch the video. To make the flexagon, click on the following image to get the full sized version. Print and cut out.