Recently, when a couple of suspicious-looking vibrating devices were delivered to our desks, we thought there had been a mistake. (Were they meant for the Cosmo offices upstairs?) After a little surreptitious investigating, we realized that the things were mascaras. Both Estée Lauder TurboLash All Effects Motion Mascara ($30, right) and Lancôme Oscillation ($34, left) are powered by tiny batteries contained in their caps. The Estée Lauder wand starts softly trembling as soon as the cap is unscrewed (and turns off again when it's twisted back on); Lancôme's has a button on the side that lets you control when it vibrates. The pulsating motion of these wands is supposed to eliminate clumps and coat each lash all the way around for more fullness. "Oh, sure," we thought. But after testing the mascaras for a week, we found that in three strokes, they give us the same lush lashes that usually take a couple of carefully applied coats to achieve. And now we can't stop buzzing about it.