The national scientific laboratory (Yerevan Physics Institute) after Alikhanyan A. celebrates its 75th anniversary. Within the frames of these solemn events, the young scientists and middle school children, as well as scientists from Great Britain, the USA and Germany have carried out scientific experiments for more than 500 children from Yerevan and different regions in various pavilions of the laboratory garden. This large-scale event, which was organized with the support of the RA Ministry of Education and Science, has united the international and national scientists around one goal: to inseminate interest in science in young people. During this event the participants have watched a cognitive movie dedicated to the 75th anniversary of the national scientific laboratory after A. Alikhanyan. The RA Minister of Education and Science, Arayik Harutyunyan who has participated in this event, has toured the laboratory by visiting the Departments of Information Technology and Cosmic Rays. The scientists of the national scientific laboratory after A. Alikhanyan handle fundamental researches in the fields of high energy physics and astrophysics, nuclear physics, and cosmic rays. The laboratory is located in Yerevan and has two cosmic ray research stations located on two summits of the tallest mountains in Armenia: Nor Amberd (2000m) and Aragats (3200m).