Chinese family looking for helper

2 adults+2 kids family, looking for helper to take care one of the kid (2 years old). Both kids are in the kindergarten from Mon-Fri, the helper will send them to school and pick them up with Grandma during weekdays. For the weekend (either Sat. or Sun.), the helper will cook 2 meals (lunch and dinner) for the kids only and playing with them. 

We have one helper already, who will take most of the housework and cooking for the weekdays and Sat.