Grandma was also able to briefly stop by and add her knowledge to our lesson as well. We learned that the cotton plant can only be successfully grown in the cotton belt (a spread of the lower states with long warm growing seasons) as it takes 25 weeks, or 150 frost free days to get to the end stages of a mature cotton plant.
This is the largest size bag of cotton balls that can be purchased at Walmart (it was about half gone) so we figured that the largest bag of cotton that we could purchase would still be just shy of 1 lb. Imagine 50 lbs!
The most interesting thing I learned was that the cotton seed is about the same size as an orange seed, though shrouded in fibers. I don't know why I never thought of cotton having a seed before. Those little bitty pieces in between my son's hands are the cotton seeds we picked out of one of the locks during our investigation.