Sorry elmo - way too simplified (and incorrect in terms of the global issue) to use an example, but entertaining none the less!

Using your analogy but a more accurate representation:
elmo said...
Picture 5 people on the beach with $10 worth of $2 coins which they are passing around between each other.
Ok, but keep in mind that the $10 is all they have to spend/save, and at this stage, no-one has charged for the manual task of handing the coins around!
That passing around is called trade, and whilst they are passing around that money that is called employment.
Sorry, but no it's not - in order for it to be a trade, there has to be some sort of transaction of goods or services, and as mentioned above - no one has been paid yet, so not employment either...
Now picture the same group of people passing around but occasionally someone throws a $2 coin out to sea (ie buying something offshore)
Umm, no. The money being thrown has no value as it is simply lost (ie; fell out of existence & in real terms a replacement would be manufactured). A better analogy would be that one of the people on the beach said "hey, give me 2 coins & I'll give you this seashell"...whilst a foreigner (standing in the water) goes "I'll give you the same seashell for 1 coin" - an easy decision??? Each person only has 1 coin, & need the other coins they have in savings to survive - so you'll give the foreigner the 1 coin so that you can continue to feed your family.
when the $10 is gone from the group pool someone has to go (ie they are now unemployed).
They were never employed, and although the $10 is gone - all the people have new shiny seashells and can walk away without the money but with goods that they bought (yes, unfortunately from 'overseas').
Maybe the shells aren't great quality & may need replacing? That's a risk that most will take as not all goods need backup service.
Had they bought their seashells 'locally', they would have had to borrow from each other which would require 'lending' principles, which is a whole other hypothetical scenario "that we will cover on next week's show".