We're growing cotton

A couple of mystery plants started growing by the firepit.  I didn't recognize them, so I let them grow for a bit.  They started flowering, so I let them continue to grow.  The flowers changed colors, then turned into these hard ball-type things.
One day Lilly says "we're growing cotton".  Sure enough those ball-type things were opening and showing cotton.  We looked up the stages of a cotton plant and they look the same as these - which are from our plants.
Micah remembers us going to Schnepf Farms last year and picking some of the cotton that's in the field across the street.  The kids pulled out some of those seeds and planted them - for fun.  That must be how they got here.  Lilly loves to go out and "pick cotton".  She really wants to go through the steps (which we learned about last year) to make clothes from it.