UP, UP AND AWAY-Jenna, 7, and Kyle Hernandez, 4, of Moorpark, prepare to ride the high-speed elevator to the top of the Sears Tower, the tallest building in the United States. They're in downtown Chicago. The kids go to Peach Hill School when they aren't climbing skyscrapers. Don't forget to take your Moorpark Acorn on vacation and send the photo to the address on page 4.