Babysitter Needed - Full-time / Part-time

We are looking for a great nanny for 2 children in Berkeley - we want to continue our older sons Spanish lessons as he transitions to from his Spanish speaking daycare. The day / time is a little flexible - ideally we would find someone available one evening per week, either mondays or thursdays weekly , 530 or 6 p.m. for 4 or 5 hours.