We have had quite a few mothers tell us they are using our bone broth for infants and while nursing.
I would recommend taking it slow to make sure there is no histamine allergy, which is pretty rare. Generally speaking, bone broth is excellent for children as it promotes health and growth.
We also worked with a school nurse who ran a program at her school for a month using bone broth and used about half a cup per day with the smaller children. You can read more on this on our blog: The Kettle and Fire Blog: Bone Broth in Schools