Blossom the Brave Balloon (1941)

This book was designed to explain to young children one of the strange new things they might see around Britain during wartime. Barrage balloons were stationed over cities and factory towns to interfere with enemy air action. The balloons made noise as they hovered overhead and were quite large. This book turns one of the balloons into a sweet girl named Blossom, who eats porridge and plays music with her friends, and becomes a hero by catching a "horrid man" in his "big, black aeroplane!" who turns out to be "a Nazi, of course". Barrage balloons were mainly useful against dive bombers, and were fairly useless when the Germans focused on high-flying aircraft.