Our partners in Poland participated and provided demonstrations and presentations during the 14 April was the Open Day at Uniwersytet Warszawski's Ochota Campus. Public was invited to visit multiple research facilities, and Fluid Dynamics Laboratory of Instytut Geofizyki - Wydział Fizyki UW was one of them. Prof. Szymon Malinowski, together with the ESR9, Moein Mohammadi and ESR 10, Emmanuel Akinlabi, presented to the public the secrets of cloud chamber and cloud research in general.