At the end of the war, when I was 6 or 7, we used to play in the Anderson shelter in the garden.

We used strips of wood to make shelves, then we got some empty tins and put them on the shelves and pretended it was a shop. The gas masks were all lined up hanging on the wall. 

For money, we used plastic money from children's games. Once, when one of the boys went in, he fetched something off the shelf and put it in his pocket without 'paying'.

The oldest one spotted him and gave him a smack on the bottom!