thank you dear titop, but I think that nanny as the name suggests can become more intimate with the children compared with a baby-sitter because I think a nanny spends more time with children compared with a babysitter.

Nanny are for babies, they needs to know a lot about babies, give them food etc...

babysitter is for young children, more like you go to the cinema, the childs are already sleepy and you let your phone number in case anything happens.