The Salt Lake City Library Square Festival of Science and Art will be Saturday, Sept. 27, noon-5 p.m. at the Salt Lake Main Library, 210 E. 400 South.

The event includes slide shows; hands-on activities; displays; a drawing and coloring competition; and rock, mineral, and fossil identification (bring your unknowns).

It is co-sponsored by Mineral Collectors of Utah, YouthCity Artways, The Leonardo, the Utah Museum of Natural History, the University of Utah Geology and Geophysics Department, and the Wasatch Gem Society.