Life is Beautiful Movie Review

Life is Beautiful is about this family, a mother name Dora, a father named Guido, and a little boy their son named Giosue, and they lived during the Holocaust. So one day the German soldiers went to their house and they took them to a concentration camp. Something that surprised about the movie was that Guido made the situation a lot happier than it was  for his son. He made the a really bad situation a better for his son so that he wouldn’t know that he was actually happening like the fact that they could die. A question that I have is is this a true story and if it is then how do they know like what happened.