Have you tried shaker cards before? I still remember getting my first on in the mail as a RAK (Random Act of Kindness) from an unknown stamper off an egroup I was in where we picked names off a list and sent out cards. It was a great idea and it was so fun to get a card in the mail every so often amongst all those bills & junk. I was in awe at this unknown technique. I couldn't put it down. I think I still have that card after all these years! I found this card sketch online & thought it would be perfect for a shaker & a great use again for those nestibilities I have!!
Here is a great tutorial that you can check out with step-by-step instructions (and photos!!) of this is a technique you want to try! Check it out here. Most shaker cards are "filled" with microbeads, but you can use anything! Coffee grounds, glitter, I've used fake "snow" in santa's beard... possibilities are endless. Anything small. I have a couple to show you: