1. Kat Murray, 15, left, and Maria Montague, 18, from Sandpoint High School, crack up whne their science project misfires. They and partners Amy and Christi Urann, foreground, were assigned to build a model trebuchet, a type of siege machine used in the Middle Ages, as part of math and science camp at Gonzaga University. Photo by Kristy MacDonald/The Spokesman-Review
2. Charlene Boutz uses everyday items to craft a trebuchet.
3. Charlotte Boutz reacts to a test of her siege machine loaded with M&M;'s, while Eric Malm makes repairs with some tape. Photo by Kristy MacDonald/The Spokesman-Review