Most of us choose a dog we like, not really thinking about ones that will get along well with our children. Children are more often bitten and hurt by dogs than are adults. There are reasons for this.
Children are physically closer to the height of a dog.
Children sometimes tease a dog. Children are more readily put into a subordinate role by dogs. If you are considering getting a purebred, look at the recommendation of breeders, animal behaviorists, veterinarians, and trainers concerning the likelihood of a particular breed to bite children. One helpful book is Lynette and Benjamin Hart's, The Perfect Puppy . Keep in mind, however, that no matter what breed you select, there is a tremendous variability, even among dogs of the same breed.