Architecture for people who like detail. Mushroom villages, a fairy village drawn as a map, a greenhouse full of plants being watered, a winter house with its lights on, and the Craft Room — the page most colorists recognize immediately, because it is their own room made whimsical.
These take longer than anything else I draw. Windows, roof tiles, shelves, tiny objects on tiny surfaces, and you can spend a whole evening on one corner.
If you like coloring in sessions rather than sittings, start here.