With past and wonderful nannies have always gone out in sentimental haze and spent too much money out of gratitude. Current nanny is basically lazy, messy, not wildly reliable, feckless etc (upside is she likes boys and they like her and she is kind-hearted). So what would be reasonable to get in circumstances? Or small gift plus some cash (she always broke as useless with money) - if so, how much? Any thoughts gratefully received, my brain is a bit broken...