Jackaroo, from your last post, I get your drift now! You mean the judgemental, Hyacinth Bucket type of volunteer who tut under their breath?
Nope, you are right - nothing like my mum thank god. My mum's a saint, bless her. Always goes out of her way to help ALL the customers in the shop find what they want.
When we were kids, we always took our old toys to the local Barnardo's children's home where they were really appreciated. To be honest, as long as they ARE appreciated I don't care where it goes. You could get a bigoted old trout in a charity shop who is rude when you hand stuff over, but you have to remember that the person buying the stuff usually doesn't have much spare cash, and they are usually VERY grateful. As are the people benefitting from the actual charity money raised.
Thinking about your situation, OP, I think I would have shown the rude woman up, even though she said what she said about her grandson having them, by saying very loudly to your daughter "That's SO kind of you, DD, to let the charity shop have your old much-loved toys! The charity will make lots of money from selling them and whoever buys them probably hasn't got much money and so will be really grateful for these toys!"