Fluffy stuff and evening light

I'm painfully aware that soon the darkness will come here in Sweden.  Even after eight years of living here, I still haven't got used to the lack of light during the winter months.  That may explain why I sometimes keep my kids up past their bedtime, just so we can soak up that glorious summer evening light.  Yesterday we found a field of some kind of 'fluffy stuff.'  Not sure what else was in that field, but I was itching like a dog with fleas when I came home.  Checks completed.  This is a flea free zone.