On February 7th, we went to IES Blas de Otero (Madrid) http://ies.blasdeotero.madrid.educa.madrid.org. This institute celebrates Science day with conferences, workshops and exhibitions. We participated with two conference-workshops: ”February 11th: International Day of Women and Girls in Science” and “From the atomic vision to nanotechnology”. Rosalía told her career path till become a research profesor and with the help of Eva and Sara made funny experiments with laser light and liquid nitrogen. Manuel explained the nanometric scale and the interesting nanotecnologic devices