The FECYT (Spanish Foundation for Science and Technology) has produced and published the Green Book of Science Fairs (Green Book of Science Fairs), with the participation of the main Science Fairs held in Spain, including the Zientzia Azoka de Elhuyar. The book starts from the fairs already in force, where the main characteristics and phases of the launch of a market are collected, as well as the good practices necessary for this, all with the aim of inspiring those who want to start organizing it.