Same with those inserts that tumble out from a catalog,
which I think are pricey to produce.
Here's how I give them the blah to TADA! make-over:
I turn them into scented confetti using a craft punch.
I make sure to punch where the perfume is strongest.
Then I put the confetti inside cards and letters ready to be mailed. That way, it's a scented surprise to the person opening it, with a shower of hearts as a bonus!