Civil engineering will be the topic for STEM Saturday with Dr. Mackie from 9 a.m. to 12:30 p.m. Saturday, April 11, at the Cut-Off Recreation Center, 6600 Belgrade St., New Orleans. To register, visit STEMNOLA.com. The cost of a STEM Saturday session is $60, with financial aid available for those eligible for free or reduced-price school lunches.

STEM Saturday participants will investigate the properties of structures such as buildings, bridges and towers. By learning how to build different type of structures, students will learn how engineers work and what goes into designing and building complex but necessary structures that are used by people every day. They also will learn about different types of forces that act on structures, such as tension, torsion and compression.

Calvin Mackie, a former engineering professor at Tulane University, founded STEM NOLA to expose future innovators, creators and makers to opportunities in science, technology, engineering and math.