I use gift bags quite a bit during the year but not at Christmas since most of my wrapping if for the grandkids. Don't want them to get to the gift THAT easy!
When I was a kid, and even now, half the fun for me is in a good wrapping, admiring it and then slowly taking it apart trying not to tear. It's that anticipation that is so yummy!
Oh... and I abhor waste!

I have to really have messed up a gift wrapping to rip it off and start all over again!

It happens, though! Kids toys hardly ever come in a
complete box!

So I save cereal and cracker boxes to cover the missing parts. LOL
This year it wasn't fun... until I drug out my stash of boxes and laughed because I had them and applied "mindfulness" to it.
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.