Is this something about being 7 and a girl? My easy child is the same way about wanting things. It's usually her friends' moms are able to get her friends x, y, z, and easy child only has a, b, c. I've taken to just telling her that it's nice her friends moms have lots of money to buy them so much stuff, and yes it's too bad around our house money is sometimes limited to what we need. And if she goes on I set it on repeat, and she usually lets it go fairly quickly. Getting mad at her for it doesn't do any good, tried that too.