A group of Pella fifth-grade and sixth-grade students are at Iowa State University in Ames for the Odyssey of the Mind World Finals. Coach Lori Parisee says about 800 teams from about 40 states and 25 countries are expected to take part in this international problem-solving competition. Students from Pella are competing in a functional engineering category called “Teach Yer Creature.” World Finals continue through Saturday. The creature, a pigeon, is named "Rex."