How can we find another doctor who knows something about kids? Preferably a specialist in pediatric neurology?

Location. If you can tell us where you are, i'd be happy to find you a pediatric neurologist closest to you. It may be close or several hours drive depending on where you are.
Pediatric neurology. Try www.Ucla.Org or www.Chla.Org ranked among the top hospitals in nation for pediatric neurology care. Hope this helps.
Pediatrician first. A pediatric neurologist is a super specialist who helps other doctors care for complex disorders. Usually found in academic centers and very busy providing care for children with severe disorders, the pediatric neurologist is high demand and high stress. Hard to find a good one.