Au pairing is living with a foreign family, taking care of the children while the parents are working.
Here the differences as to normal au-pairs: more responsability, clearly defined working hours, social benefits as holidays etc., greater separation of work and private life and more independence as nannies often do not live with the family, higher wages.
The word "Au Pair" is a French term, which means "on par" or "equal to", denoting living on an equal basis in a reciprocal, caring relationship between the host family and the children. An aupair will typically be a young woman and sometimes a young man from a foreign country who chooses to help look after the children of a host family and provide light housekeeping. The aupair is given room and board and is typically paid a weekly "pocket-money" salary. Aupairs generally stay with their host family for one year.
I spent a year in England as an au pair.