Spooky Mad Science Expo

October 18, 2025 3pm – 7pm

Patrick Henry Recreation Center 4653 Taney Ave Alexandria, VA 22304

Science • Games • Prizes • Live DJ • Food Trucks

Hundreds of future astronauts, engineers, scientists, and mathematicians come out to the Chrysalis annual Spooky Mad Science Expo – a fun, interactive, captivating and educational event that combines Halloween with science projects. This mid-October event is held with the participation of volunteers from organizations like the Smithsonian Air and Space Museum, National Science Foundation, NASA, Boeing, American Chemical Society, USPTO, and the American Institute of Architects, Alex Renew, Titan Robotics, United States Marine Corps, NASA Heliophysics, Jerome “Buddie” Ford Nature Center, Office of Historic Alexandria, U.S. Patent and Trademark Office, Sympatico, Army Educational Outreach Program, KoiBots, and many more!

Take a trip around the world with our food truck vendors! Delicious choices so you don’t try just one! Every truck is native owned and operated, so you know that you’re getting an authentic taste!