«Adult problems» is an edition of RUBIO composed of two notebooks: Memory and concentration and Calculation and logic, which are precisely about that, about the problems that arise when you stop being so young. In them you will not find solutions to your problems, but we can assure you that you will learn more than one curiosity and, most importantly, you will have some laughs with our challenges and hobbies.
The idea of this notebook is that if you change, at RUBIO we do it with you. Because these hobbies, ultimately, are only looking for that: to continue spending time together.
