Gingerbread biscuits as we know them today, come from Medieval Europe and were popular because the ginger acted as a natural preservative. The term 'bread' partly comes from the French 'gingerbras', meaning to 'preserve with ginger', but also refers to American biscuits, which in the US are actually scones.
It was after the Brother's Grim fairytale 'Hansel & Gretel' that gingerbread houses began to be made in Germany; not long after that, gingerbread men followed. I've made basic round biscuits, but if you are baking with children, then you can make gingerbread men and decorate them with sweets. Based on the brands I used, each biscuit is about 110 calories.