I don’t think you’re being unreasonable as such, it’s the way you are, and your grown up children should know this. We are just different. We don’t do presents for adults, unless it’s a landmark birthday. My MIL expected certain things, and this was one of the many things that lead to eventual estrangement. I looked after grandchildren while the parents worked, and it was such a privilege, and not fair for them really. I had had my time, and it almost felt like I was receiving a gift. I certainly wouldn’t have wanted paying for it. Well that would have defeated the object if nothing else. It sounds like you had a lovely gift, whether it was £3 or £300. Be careful, as this is the very thing that could cause problems further down the line.