Karl and Mary, also known as “Mr. and Mrs. Catapult Guy,” pose for a photo at their table where they sell marshmallow catapults during Michigan State’s annual winter arts and craft show at the Union on campus in East Lansing, Mich., on Saturday, Dec. 6, 2025. “I started this with my Cub Scout,” Karl said. “So it’s been fun, I’ve been doing this since the ’90s, so a long time.”