Prof. Andrea Madarasová Gecková, a head of Department of Health Psychology and Research Methodology at Medical Faculty of PJ Safarik University in Kosice and Bc. Marek Džalaj, a head of Children organisation Fénix met on 23 November 2021 and signed a Memorandum. We continue our collaboration on health and health-related behaviour of adolescents and we are looking forward to the next productive steps ahead of us.