Back to Earth

The K.C. snow is almost gone and the dog park was a muddy mess this afternoon. I recently, at Weeflecky's prompting (which she then completely forgot), signed up for the Emma Davies 365 day photography challenge. I don't get the first email until Thursday. She suggested that, meantime, folks might want to do her 30 photos challenge. So, here is my "things in threes" photo. Can you guess what these are?