This paper discusses logic puzzles, often used with students in the mathematics classroom, in the context of foreign language education, highlighting them as tools for individual or class practice in a problem-based learning environment that combines challenges and entertainment. Benefits of logic puzzles in the foreign language classroom include helping students develop higher order thinking skills and repetition of words and sentence segments in a limited, well-defined context and at a frequency that in all other circumstances may be perceived as unreasonable and may generate boredom. The paper introduces sample puzzles accompanied by the basic principles of authoring and solving them and makes references to the possible role of puzzles in vocabulary acquisition and reinforcement of language structures. It concludes that logic puzzles should be considered a valuable enrichment tool that allows language teachers to add color to their class activities and create mental activities, thus providing challenge and entertainment at the same time. Sample logic puzzles are appended. (Contains 10 references.) (SM)