"Ronri" is a Japanese word (論理) meaning "logic", which is the science of correct reasoning. Ronri series of logical thinking games aims to develop the abilities and skills of logical thinking of children and adults according to a rigorous scientific approach. The learner acquires the right-thinking skills by applying a strategy of "learning through play", which allows them to learn and practice many logical thinking skills in an atmosphere of pleasure and entertainment. This series was designed and developed by experts in logic. In addition, all games have QR Codes to explain the instructions and correct answers.