The original question was:
"Where can one find examples of how common, daily activities with kids fit into 'subjects'?"
So, let's start with the activities, rather than starting with the subjects, and we'll start with very young children, because we all have to start somewhere.
A few everyday activities and their relevance to education (and life):
Breakfast (home ec, nutrition, health)
Reading to the kids over breakfast (reading, reading comprehension, faith [if you read Bible stories or other faith related books], history [if you read historical works], English [hey, it's a book!], vocabulary)
Morning routine (personal hygiene = health ... threats about what will happen if we don't wash and brush teeth = science)
Morning chores (citizenship, faith and self-discipline as those relate to family cooperation)
Daily Mass (faith, history, recess if you go for donuts afterward)
Make cookies (math while measuring, home ec, science, kitchen chemistry)
Make lunch (home ec again ... lots of home ec)
Break up a fight among siblings (explaining interpersonal communications = psychology ... repentance and forgiveness = faith ... learning to get along = management and human resources skills)
Trip to the post office (social studies, community study, citizenship, how government works, art ... yes, art! Aren't you going to examine all those stamp designs?)
Drive home (point stuff out -- geography of your town)
Watch an episode of Magic School Bus (science)
Take a nap (health)
Wake up from nap (science: explain the necessity and importance of sleep, explain the difference between night
Take a walk (a nature walk! Science! Charlotte Mason is so happy with you right now!)
Tell children to play while you check email (play is serious business, people!)
Check email some more or call your best friend (hey, your sanity is important ... explain to children that social contact is vital. This is psychology and sociology.)
Start dinner (home ec! Again! Lots of home ec!)
You get the the idea. This is the easy stuff. When they're little, you really don't have to worry about record-keeping the subjects but do it if it makes you feel better, as it often made me feel better, or if you need to report on your schooling in your state. And do it for practice, for later days.
And as they get older, the connections, the overlap of subjects, the science of relations becomes clearer in so much of what we do with our children, and in what they do on their own.
More to come.