and i get to help science teachers. it has four servo motors and a wireless microcontroller. over the last three years we've put nearly 100 million dollars into american education. that's thousands of kids learning to love science. ♪ isn't that cool? and that's pretty cool. ♪ more than 50 times a day? so brighten your smile a healthy way with listerine® whitening plus restoring rinse. it's the only rinse that makes your teeth two shades whiter and two times stronger. ♪ listerine® whitening... power to your mouth.