From the greetingarts blog:

Using pads of sticky notes, scrapbook paper and a few other supplies, I made one of these books for each of [my daughter’s] classmates to celebrate the last day of Kindergarten. It didn’t take that long, and I thought some of you might like the idea.

This is a nice way to prevent sticky notes from getting all smushed and ruined in your bag, and the tie closure can be used in any sort of paper project. (Thanks, Patti!)