of tape? (You can't tape the tower to the table.) How tall can you make the tower and have it support the weight of a pack of chewing gum? • How well does your tower withstand environmental forces?

The new tower would fit between No. 80, the Thomas Jefferson Specialty Care Pavilion in Philadelphia, a 364-foot-tall, 19-story hospital, and the current No. 81, Ascent St. Petersburg, a 357-foot ...