Maybe a Trillion for this, half a Trillion for that.
So what does that really look like? This was done with Google SketchUp
http://sketchup.google.com/
1st we have a $100, everyone has seen it before.

Next we have $10,000 , a nice little packet of money only a half inch thick.
Would pay for a nice vacation, or a cheap car.

Then we have $1 million, which is one hundred packets of $10,000.
While a lot of money this is around what the average person makes in their lifetime and would easily fit inside of a briefcase.

$100 Million is more impressive, it takes up a whole pallet.

$1 Billion is where the number starts to get really mind boggling
$1,000,000,000 would be 10 pallets, each with $100 Million

Finally we come to $1 Trillion
Which is a Million Million or a Thousand Billion or
$1,000,000,000,000
Which looks like this

BTW you did notice those pallets with $100 million are double stacked right?
Just putting things in perspective