Live-in babysitters, also known as NANNIES, are individuals who provide childcare services in the home of the family they are working for. They are responsible for providing care for children of all ages, including feeding, bathing, and playing with them. They may also be responsible for light housekeeping duties such as laundry and tidying up. Live-in babysitters typically live in the family's home, allowing them to be available at all times.