Examples of Programs I wrote with my children using Processing. See Processing.org and Processingjs.org.
Until I get this working, check out the programs on my other web site at JeffryErickson.com
ShrinkingBubbles
Shrinking Bubbles based on
Bouncy Bubbles from Processing Examples which is based on code from Keith Peters.
Multiple-object collision.
Modified by Jeff Erickson
January 6, 2013
Source code: ShrinkingBubbles
Or if that is not working try here: Shrinking Bubbles
Built with Processing
and Processing.js
This is my daughter! 
One could argue that Keynesian stimulus was araeldy discredited from 1930 1940, when FDR tried to spend his way out of the GD with public works projects. It is widely acknowledged that it was the massive investment in the WWII war machine that finally pulled the economy back to growth. This deficit spending was done for investment in productive machinery, not entitlements, and was financed largely by our own citizenry rather than foreign powers.