Part-time Nanny for 1 year old in Webster

We are looking for care in our home for our one-year old little boy (15-months old). Mom works outside the home and dad works either from home or out-of-town. Big sis (3.5 years old) attends preschool and will be gone during the day. The nanny will be responsible for the little guy's care and associated tasks: changing diapers, putting down for naps, feeding (solids), and cleaning up after self and baby. We are looking for care from 8am to 6pm at our house in Webster Groves (Tuxedo Park) Monday, Wednesday, and Friday. The sitter should be a non-smoker and have reliable transportation. We are looking for someone who loves children (our little guy is sweet and has a gentle demeanor).