NannyB2604 when I was a small boy, all my grandparents and other relations would send me a card, usually with either a one pound note in it, or maybe a ten bob note. From an age when I could barely read and write, along with my sister, I would write a thank you letter to each and everyone.
I remember that because when I was six, (I think) my sister and I had a Toy Town post office Christmas gift. We wrote on Toy Town note paper a thank you to my grandparents, put the letter in a Toy Town envelope, stuck a Toy Town stamp on the envelope and posted it.
The receiving sorting office put a surcharge to pay on the envelope, but the post lady was having none of that. She went ballistic. "Two small babies," she shrieked, "writing a thank you to their grandparents, and you want to surcharge it. Shame on you!" The surcharged was waived.
Later in life I learned that the story made the local press and then the nationals got hold of it. I told you that because we are of a generation that knew please and thank you. It saddens me that your relatives haven't acknowledged their gifts. But as midgey said, you might still get a letter. If you do, and it's got a Toy Town stamp on it............................