I am starting to think that it may be a good idea to give my twin sons different allowances.
What is the point of giving different amounts of money to your kids of the same age?
I don't think they will both need the same amount of money, because one of them likes to work for everything he has.
You are treating one child better than the other. You should not favor one child over the other because that will be hurtful to the child that you are not favoring.
I know about my kids and what they like. Kids can't be reasonable with money so I know what's best for my kids.
While it does make sense what you are saying, giving one child more allowance is just going to make the other one upset. I think an allowance should simply be money you give them every week. If they want to earn more than let them do different chores and things like that.