I cannot imagine what it's like to be a school age child right now. Socialization has basically been suspended indefinitely.
From 1939-1945, a World war raged. It involved millions of people. Death tolls range from 20-60 million. We in North America were spared. The fighting took place on all continents except here (Pearl Harbor aside).
If you lived in London, you would have been bombed fairly regularly. You would have spent 1940-1942 in real fear of an invasion. Your would have lived in real fear of terrorist attacks. You would have seen your Father march off to war with a good 10% chance that he would not return. No means to make money, you may have darn near starved to death. By 1943, the v1 and v2 was raining on you. If 12 in 1939, you would have been 18 in 1945 and off to war you went. To participate in the last few months, when fighting was intense and death rates were high.
At the end, Britain along with all of Europe endured an economic hardship that was crippling. It took the Marshall plan (please read up on it) to save Europe.
And the beauty is: by July 1945, the Americans had project Trinity and an atomic bomb was detonated. Leaving Europeans to spend the next 50 years with nuclear uncertainty and living on the front lines of the East/West conflict. Never knowing when all hell will break loose.
School aged today, versus 1939!!! those kids in 1939 survived, flourished and became humanity's most successful generation. They put a man on the moon in 1969, evolved medicine to heights we have never seen and advanced things in quantum leaps over all generations before them.
Humanity's golden generation was born between 1920 and 1940 and endured way more...Now think of the 80 and above that covid is trying to massacre.