I just saw a website today that's called "The MegaPenny Project."  The site's objective is to try to illustrate very large numbers using a very common item: pennies.

Their images are very helpful, in and of themselves.  But the descriptions that go along with them bring the images to life.

Here, for example is a link to the first of two pages illustrating what a Trillion pennies would look like.

Change the pennies to dollars, and that's how much this new stimulus package will cost our country by the time all is said and done.