We read two stories (one of them Mike Mulligan and his Steam Shovel) and looked up what feathers are made of and what their parts are (although I must say the Eyewitness book was a little sketchy on details) so we now know the difference between body feathers and wing feathers, and will look at feathers on the ground and try to decide where on the bird they came from.
The boys went out with my parents this morning so I had a flash of enthusiasm and reorganized the whole downstairs. I'm still pondering toy organizing strategy. It should make the kids want to use the toys, and make them easy to put away. This is complex. Later I will provide photographs of the livingroom and boys' room to ask for advice (besides 'throw out all the toys', which sometimes seems reasonable).