I have shared bits of these pages here and there, but never the full layouts, which I think are useful because they show how little I actually draw or paint (only a couple times a month) versus how often I write notes (pretty much a bit a week). I average about half a page a week, though it doesn't work out exactly that way--sometimes I work for longer and sometimes I just add an observation or two. (Or sometimes when I'm in the first trimester or overdue, I don't journal at all! ;))
The point I want to make is that that there are lots of different ways to journal, lots of different kinds of observations we moms can be making. I also hope you can see here that a practice done slowly yet consistently can bear fruit. I don't have time to sketch every day, but even the bit I do manage weekly nets a lively, useful record of our adventures and discoveries. And I'm getting to know with intimacy the world around me, which is far more important than the product but directly flows from creating that product, if that makes sense.
Simply put: drawing requires a special level of attention to detail, and that's the main reason Charlotte Mason suggests it. But when you have your hands full and the thought of getting out the paints gives you a headache, a few jotted notes are much better than not recording at all!