Looking for a nanny for afternoons and weekends for my children

I am looking for a part-time nanny starting mid-September for two children (3.5 and 2 years old). Location: Upper East Side (Manhattan), near the 4/5/6 and Q train stations. Requirements: 2-3 afternoons a week after 3:30 PM with the possibility of additional hours on weekends. Interested parties please send a text or voice message.