I found this cool app mentioned on Consumerist.
Put together by the bipartisan Committee for a Responsible Federal Budget, the simulator first asks you to review several big-picture (and big-money) policy issues like whether to renew tax cuts, freeze the sustainable growth rate, or reduce/maintain troop levels in Iraq and Afghanistan.
You are then presented with options in the Defense, Domestic, Social Security, Healthcare, Revenue and Tax Expenditure categories, all with the goal of getting the debt to equal 60% of GDP by 2021.
This was a lot of fun to play with – imagine having this much control over $$!
Try the app in the Chrome Browser at crfb.org/stabilizethedebt/.