I know I'm late to this party, but I just had to throw in a few cents' worth about scale. I am such a bug about having things "match," but little kids Just. Don't. Care. The Calico Critters per their furniture made by Sylvanian (as I measured and calculated) are 1/19. Supposedly Polly Pocket works really well with their houses and furnishings if you wanted humans rather than creatures. The critters themselves are so lumpy and oddly distorted that I don't think you can claim any particular scale at all for them. They are big for 1/24, and look odd with those accessories. They are sort of lumpy for 1/12, and will fall off furnishings, even while looking oddly undersized. (But how tall should an anthropomorphized cat be, anyway?) Target makes knock-off creatures called Lil Woodzeez whose furniture is similarly widened and shortened and works well. I would point out that my charge plays with Barbie, Critters, Playmobil, Lego, and an odd assortment of figures all in the same rooms, and is constantly thrilled. Whilst I cringe every time a tiny person eats an apple bigger than their head, LOL! I think the most important thing you can do here is make sure everything is sturdy, and put away anything that has to be used "gently" until every kid who ever comes near it understands what careful handling means. It's not worth hovering anxiously or mourning when things are ruined by regular play. And for kids, isn't play the point? I work endlessly to distinguish between "collect" and "play" for my 4 1/2-year-old friend, and it's an uphill battle! Sometimes very difficult to explain the difference for people who don't collect miniatures, too… : )