i need some advice ! please help me

quick question. im going to school for medical assisting, im going to be done next october. NOW i was thinking about going for my LPN but i dont want to work with adults and seniors, i just want to work with kids. I was thinking about being a pediatrician, its SO much schooling but hey im willing to do anything for my career. i would like to work in a pediatric's office. can LPN'S and RN'S work in a pediatric's office? does the pay decrease?