Elena Manteca and Gema Pérez participated in the event Science Day (“Jornada de la Ciencia”) organized by the CEIP Sardinero. During the day, the students of 4^th, 5 ^th and 6 ^th levels of Primary School participated in different  workshops in the field of chemistry, maths and geology. Elena and Gema were in charge of the Chemistry Workshop. They showed the students  how they daily work at the lab is, and some experiments and analysis about water treatment and reuse were performed.