From the left: Jenalee Robbins, Rayne Murray, Julian Garrett, Elijah Miller, Abram Stiegman and Lexi Divine try to blow apart a castle made of paper cups using miniature handcrafted vortex machines on Tuesday afternoon at the Joplin Public Library. The program, "Spark a Weather Reaction," was part of a series of programs focusing on weather for teens.
Globe | Laurie Sisk