OK let me start (before I get a roasting) by saying that I do think saying thank you is important. However, there is something about doing ds1's that depresses the hell out of me. And I resent doing it (not because I resent having to thank people- it just makes me resent our life). He's 7- he "should" be able to produce something of his own. He obviously can't. He doesn't/can't draw so sending a picture is out. He hates things like handprints and doing craft activities with him is incredibly hard work anyway because he wanders away after 2 seconds. He obviously has no concept of thank you, or a gift being from someone anyway.
So what do you do? I'm thinking of importing a photo of him into a symbol writing package and putting thank you for your present in symbols underneath, then adding that in with ds2's thank you letters. Anyone else have any other answers to this?