It depends on the circumstances, really. If they bought it out of the blue, then yes. However, if it was, say, a reward because the original kid did something good that the other one didnt do, then no.

There should be no obligation as there's no reason parents have to be fair and reasonable, but generally it's a good thing to treat kids equally when it's a random purchase. Parents should value fairness for themselves as well as their children.

There isn't really an obligation to do so, but it would be unfair for the other child to miss out, unless they had been badly behaved, in which case it would be perfectly fair.

Depends~ It could be as a reward, maybe the other child can't eat chocolate, ect. But if it's for no reason I think it would be better, or at least have the one child split the chocolate bar with his/her sibling. The other child could feel left out or that the parent is favoring the other child over the other. But, it's not like you can force the parent to do so or anything. There's no real obligation.

My view point is pretty much similar to everyone else's; if there's a legit reason why the kid doesn't get the chocolate then it's all good. But even if the parent just bought the candy for no reason they don't have to get the other kid one. I just feel like it would be the nicer thing to do on the parents' behalf.

^ That's how I feel about the matter. If I had two kids I'd try to keep it fair. And I agree with the points you bought up. The only reason I didn't pick yes is because, let's face it, not everyone has good parenting skills and in a sense it is the parent's money and no one can force them to be fair to their kids. But we sure as hell can judge them.

Depends on the situation. If one got good grades and their reward was a candy bar, then no, if the other got bad grades they do not deserve the same rewards. If the other kid was bad and it is their punishment, no. But if they're doing it just 'cause and they both deserve one then yes, they should. c: