Copernicus Science Centre (Polish: Centrum Nauki Kopernik) is a science museum standing on the bank of the Vistula River in Warsaw, Poland. It contains over 450 interactive exhibits that enable visitors to single-handedly carry out experiments and discover the laws of science for themselves. The Centre is the largest institution of its type in Poland and one of the most advanced in Europe. In 2015 it has been visited by over 5 million people since its opening. en.wikipedia.org/wiki/Copernicus_Science_Centre
Some of the devices from 2013 might have been replaced by others. Later my son went to the centre on a school trip and said that there were new exhibits.