When a tornado threatens his farm, Otis the tractor must try to save the animals, including an unfriendly bull. Interest Level: K-3 Reading Level: 3.8 ATOS Book Level: 4.2 AR Interest Level: LG AR Points: .5 AR Quiz: 145506EN Reading Counts Level: 3.6 Reading Counts Points: 1 Lexile Measure: 760 Lexile Code: AD (Adult Directed).