Federal Reserve Bank
Federal Reserve Bank of St. Louis: The Piggy Bank Primer [Pdf]
A workbook for children on how to save and manage their money, and how to create a budget.
Other
Nathan Newman: National Budget Simulation
This online simulation should give you a better feel of the trade-offs which policy makers need to make in creating federal budgets and dealing with deficits. The simulation comes in a short and long version and allows learners to see...