"'You're saying it wrong', Harry heard Hermione snap. 'It's Wing-gar-dium Levi-o-sa, make the "gar" nice and long.'
'You do it, then, if you're so clever,' Ron snarled.
Hermione rolled up the sleeves of her gown, flicked her wand and said, 'Wingardium Leviosa!'
Their feather rose off the desk and hovered about four feet above their heads."
-Harry Potter and the Philosopher's Stone, J.K.Rowling.