Sorry for your loss.
Exchanging gifts is always difficult and probably best done on the quiet. Someone once sent me a completely unsutable "activity" experience which I quietly passed on to one of my sporty young nephews.
I think the posters upthread are correct in that your problem lies with your son. He is obviously much under the influence of the DIL. I would leave it for a few months and then try to rebuild your relationship with him. Perhaps he would agree to bring your grandchild around for an hour or so nearer Christmas.
Last letters make new words - Series 3

