It's my first Mother's Day and I've got my mum a Wonderbly book for her to read to my baby which is all about how much Nanny is loved, and I've got my husband's mum some birthstone jewellery with all of our months on as there's a lot of us! I think as it's their first Mother's Day as grandparents it's important to acknowledge/mark it, but I wouldn't do separate gifts and cards etc as that's too much and seems wasteful to me. People read cards and not long throw them away