“The best part is that she can divide into halves and quadrants.”
Teach her basic navigational coordinates (latitude and longitude; degrees, minutes, seconds). I learned that very early from my father, who had been a pilot in WWII, as well as a recreational sailor. I’d spend hours plotting out famous ship wrecks, etc. Lots of fun. She will likely enjoy that, especially when she associates it with going places, the more exotic, the better.
Great points!