On these winter days I have been using our UV box to expose my cyanotype photos. We built it for photogravure, but it works like a charm for cyanotypes as well. When the sun is not strong enough to make an exposure, it is a reliable alternative.
To me it's a bit of magic how the light shining through a feather can pick out the patterns.
I tried toning one of my prints for the first time. It started out blue like the others, then I bleached and soaked it in strongly brewed tea. Voila brown. There's lots to explore when it comes to alternative photography.