What should I buy my gran for her 70th birthday?

What about a nice piece of jewellery, say a necklace or a bracelet? Or maybe one of those v-shaped back rest pillows so when she's sat in her chair or in bed she'll be really comfy. You could even take her for a special meal if she's up to it. It's really sweet that you care enough to as others for suggestions. Don't forget a really nice card!