OK OK OK I'll concede, I won't call it a token
It will be a highly polished circular piece of .999 silver sorrounded by a copper? rim.

Here's a TOKEN of my appreciation for an hour wort of fun.
See what you can redeem that for

In regards to your question "If they sold them in the gift shop" I think this is a moot point simply because if it had a redeemable value, it couldn't be sold in a gift shop.