When our son first started talking I dutifully wrote down all the words he learned. I gave up soon after when I’d written down about fifty and he had started asking me the words for items. I could not keep up. Now that he’s in the stage of dealing with toddler emotions, I’ve thought about keeping track of which emotions he understands and can verbalize to us. This has got to be a more tractable task than potentially cataloging Webster’s sans definitions. Well, if you get to all the nuances of even the (disputed) basic list (e.g. liking a friend is different from loving mom) this may not be as simple as it seems. I think I’ll scale back to keeping a list of what vegetables he’ll eat.