Other forms: manipulations
Manipulation is the skillful handling, controlling or using of something or someone. Whether it's the sculpture you made in art class or how you convinced your friend to do your homework — both are considered manipulation.
From the Latin word for "handful," manipulation certainly has much to do with using your hands to move or shape something, like a good DJ manipulating two totally different tunes into the perfect mashup. But this word also has some negative connotations — a manipulative person knows how to twist words, play on emotions and otherwise manage a situation in a sneaky fashion to get what he wants.