Imagine each object being a person, and imagine a room large enough to fit 10 000 people, the size of a small village, standing side by side, barely being able able to touch each other's hands, spanning roughly 15-20 km.
Now imagine putting 9 999 people behind every person.
And finally, imagine stacking 9 999 on each of these million people's head. That's twice the height a normal airplane flies at.
Then double that number. That's how many objects have been created so far.
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A bit long, but I think the roughly human scale numbers, 999s and even more effect makes it almost imaginable.
EDIT: Another one - you could fill the whole of manhattan with cents and still have money to spare.
(Manhattan is 87.46 km^2 and a coin is less than about 40mm^2)