Just wondering others thoughts on this, it's a tale as old as time I'm sure!
I take my DD (2 years 3 months) to a playgroup each week and I never know how to act when another child snatches a toy from her.
I actually find it easier when she is the snatcher, because I can firmly tell her not snatch, return the toy and distract her with something else. But I feel like I can't do this with someone else's child. If the other parent is there, it's usually fine but half the time nobody seems to be watching their kids to address it.
It pains me when someone is wrestling something off her that she's happily playing with and she looks to me to help her and I'm not sure I do the right thing! I've asked children before to wait their turn and hand it back to DD but they don't and I obviously don't want to snatch it back and model the very behaviour I'm trying to stamp out 
So what's the appropriate way to deal here??