Mechanical Gears series, with intricate designs,stylish and high quality plywood,are run by wing or motor. This series has various wooden puzzles, such as gramophone, owl clock, projector, or vehicle models suitable for home decoration. What is particularly powerful is that every finished product is not just a model; they can “move” under the amazing principle!It is a challenge for ages 14+, which opens a new world of creativity,knowledge and pleasure !