I was on the receiving end of this when I was young - or rather, the not-receiving end. It cooks sock. It made me feel inferior, unloved, unwanted, a burden, a disappointment.
Atm my DM is spending much more time with my DSis' kids than mine. Both Dsis and I live abroard, she in an English-speaking country, I not. So DM doesn't get to see the dgc much so pampers them when she sees them. Ecxept my DS. We hear, all the bloody time, about ehat she does with my niece/nephew , how she helps my dsis blah blah, but when she visits us she sits on the sofa drinking e-n-d-less cups of tea and just watcheds DS from afar. She won't pick him up (he's 15months, she's not old), or push the pram.
My DFil on the other hand, he's old, quite unstable and weak, adores each of his 8 gc equally and loves interacting with DS, he often asks to push the pram and feels really proud!
I try not to let my DM situation get to me. She's a bitter narcissist who wouldn't recognise her actions or change.
Coukd you, or your DH, pperhaps state that although you couldn't give two fat figs whether your dc receive anything, (money or otherwise), could she just not do it in front of them? Asking the dgc who got a fiver to be quiet about it is nuts!
Sorry for the thread highjack 