Quercetti's Tubò Pitagorico is a useful study companion for every child, for learning multiplication tables from 1 to 10. By turning the two colored knobs at the ends of the tube, both the result of the set multiplication and the result of the corresponding division will magically appear in line. In short, with Tubò, numbers will no longer hold any secrets, and everything will be very clear, intuitive, and easy to memorize, also because only the desired numbers will be visible while the others remain hidden.