M.M.
Dear N.,
First, I would make certain that she is actually stealing the money. I would point blank ask her where she got the money that she bought her last webkins with. If she says she found it, or some other excuse, explain again how taking money that you find is "stealing", and that if you find her with any money that she did not get from you or her father then she will have to apologize and pay the person back that she stole from. Or you could try to catch her in the act, and explain again why it's wrong. Sometimes I think kids think "What's my parents' is mine too" and don't think of it as stealing. Ask her if she thinks taking a toy from a store without paying for it is wrong, and how that stealing is stealing no matter who you steal from. If she confesses I would praise her for telling the truth, but I would still make her apologize and pay the money back by doing chores, or ground her from webkins for awhile, maybe a week or two, since that what she is spending the money on.