I don't really understand though.
Your daughters are all looking at these cards intensively, scrutinizing the artwork, but there's also something else on the card: the text that says what the card actually does. How does one look at all of these cards without even considering playing the actual game? If I were asked for some kind of art ranking committee involving a card game I don't know a lot about - say, Magic - I would estimate the chance of me becoming actually interested in the game itself to be about 99%. At the very least I would want to know what all of these things on the card meant (in the case of Dominion, +Cards, +Buys et cetera).
I guess your girls aren't nerdy enough.