The likelihood of this experience being as good for the animal as it is for the children is nil. Baby animals should be raised with members of their own species, not small Homo sapiens. It is best for all involved to keep young children and wild animals separated. No one can know everything about everything. For the independent wildlife rehabilitator, it is best to learn the basics about wildlife rehabilitation in general and then focus on one or two groups.
Different animals have different feeding schedules, diet requirements, and cage requirements.
Trying to do all mammals, all reptiles, and different species of birds is just too taxing. You cannot do it all. You can try, but the end result is usually disorganization, improper attention to an individual animal's care, and a loony, burned-out rehabilitator. There is a vast network of wildlife rehabilitators and veterinarians for you to rely upon for information on subjects unfamiliar to you and to whom you should refer animals you are neither trained nor set up to care for.