A friend sent me a link to a website showing how much 1 trillion actually looks like. It is probably more than you would expect.
Start with $100...

Then $10,000...
...a packet of one hundred $100 bills is less than 1/2'' think

Then $1 million...
...100 packets of $10,000

Then $100 million...

Then 1 billion...

Then 1 trillion...or a million million, a thousand billion, or one followed by 12 zeros...

and ps...the pallets are double stacked...
http://www.pagetutor.com/trillion/index.html