But, I can testify that it's a really great product. We have these and really like them.
The 4 chambers are Save, Spend, Donate and Invest. Great visual object lesson. Your child gets a dollar. Break it into dimes. Have them put 1 in Save, 1 in Donate, 1 in Invest, and then they can decide how to allocate the remaining 7. Or you can decide together. Great way to teach about money and to regularize your family's values. (Now, if only you adults would do so well... ;-)
Now, I'm not real concerned about teaching 7 year-olds to invest as long as they are learning to Donate and Save. Plus, at our house, so far, they want to save up for American Girls and Nintendo games, so there's not much immediate Spending.