I purchased these along with the Calico Critters Nursery set as a starter/tester kit to see if my 3 yr old daughter would like the Critters toys (she likes tiny toys and has the finger dexterity to play with them pretty well). So far, so good. My only criticism is that the clothes are removable, which would be plus, except that they are very difficult to put back on -- even for my 40-year-old fingers, much less for a 3 year old. So inevitably my daughter removes the clothes and then brings them to me to replace. Otherwise I like the Critters line and will probably buy some more in the future. I think they are a nice, childlike, and more aesthetically pleasing alternative to other "miniature" toys like Polly-Pockets.
I love these puzzles, and this one is nice for the variety of senses to which it appeals -- touch, sight and sound (and who knows, probably taste too!). This was purchased for a niece, but my own kids have enjoyed similar puzzles. Probably good for kids 1-3 years old.
My three year old loves little things (eg. Playmobil), so I thought she might like the Calico Critters, and this was a relatively affordable starter set. I purchased them along with a set of the Baby Kittens. She has enjoyed them, although some of the pieces are quite tiny and a little difficult for her 3 yr old fingers to handle, even though she has pretty good dexterity. But that's ok -- she will grow into them. I like the child-appropriateness of the Critter themes too -- animal families, modest but cute clothing (I guess animals don't actually need to be modest, but I'm thinking of some of the dolls marketed to even little girls these days). A good alternative to Polly-Pockets and that sort of thing, and a toy that I think they can grow with.
My five year old loves stories and princess/fairy tale stuff, so this simple little gift has been such a hit. Our whole family has enjoyed it, and it's also a lifesaver sometimes when my girls ask me to tell them a story. You can play it a variety of ways, but one of our favorites is to have someone else pick 7 cards for you, and you have to make up a story with those. Creative and fun -- and would be great for car trips!