Since my post title gives away what I used on these bookmarks and note cards, I won't play a guessing game.
Yes, it's bubble wrap, painted with craft paint and used like a rubber stamp. Pretty cool and easy, although a tad messy.
Here are the finished bookmarks. I like the way they turned out. I will say, however, the "bubbly" background does compete a bit. I found using small images just didn't look right.
Below are the two cards. I ended up covering most of the bubble stamping. Maybe I should keep that in mind next time and not add so much paper, but they look pretty nice if I do say so myself.
So yet another way to play with bubble wrap besides popping it! Have a nice day!