My Mum gave her younger grandchildren (14, 12 and 10) money for Christmas - no thank you letters, phone calls or anything heard from them since. Likewise for me. I put money into their parents' bank account for Christmas presents. No thank you ever received from the children or the parents. I have not idea what they bought. I had to ask if the money had been received. I sent a DAB radio to my niece for her birthday at the beginning of January. No thank you. I had to ask if it had been delivered. It had. They have clearly been brought up not say thank you. However, I am getting heartily sick of it. Any ideas? Do I mention it to my sister or leave it be? She will be cross with me if I do becase she hates her parenting style being questioned. I cannot see how rude children can be a good outcome though!