There's a thread a bit further down from last week on this too. The norm seems to be a week's salary and a thoughtful present. For a good one! I've bought outs around £150 worth of things I know she'll like and wouldn't buy herself. Plus bonus. If the kids are old enough maybe they can choose something too.
I've been a nanny for 29 years, I have had a cuddly Eeyore (no interest in cuddly toys or Winnie the Pooh beyond reading the stories to my charges) and a huge winter coat (I don't feel the cold and have never owned a coat other than a ski jacket or two, I never wore it and my dad ended up with it!) to well thought out gifts of a expensive camera (I love photography!) my beautiful Kitchenaid and beautiful pieces of jewellery.
I have had bonus' of £20 to a month wages. Very grateful for all I receive but life the ones the children pick out (with a little guidance from mum!) and still wear the ring my second charges chose at 3 1/2 and 2 1/2 and the eldest was 30 last month!!