Both my kids have heavily used our Sophie and H doesn't even have any teeth yet. Even when your baby isn't teething Sophie is a really fun toy. Sophie starts being fun I would say from around 3 months of age when a baby is starting to find more interest in toys and picking things up. Sophie is soft and easy to squeak unlike most other baby toys and her long neck and legs make her easy to grab. She is great for teething and my two year old still loves playing with her because he is learning his animals. I don't think Sophie will be retired any time soon.
Disclaimer - I do not have any affiliation with Vulli. I was not payed or given anything free in exchange for this review.