Folded notes. This tutorial came in handy tonight when I had to get creative for Annsley (10 years old) who needed a visit from the tooth fairy. Thank you!
how to fold a simple origami valentine
how to fold origami notes for valentines day like you did in junior high and middle school, at Assemble Shop
ぽち袋風折形「お年玉包み」の折り方 PDF4種（桃、紫、黄、青）有り もっと見る
How to Fold Paper Into a Secret Note Square: 10 steps
Easy Origami Envelope- all you need is a piece of 8.5x11 paper, no scissors, no glue!
Oh, passing notes...now they have cell phones. They are missing out!!!
Origami Square Letter Fold. Can hold something small because the finished letter is closed on all edges. About 3 inches square when done (from a piece of 8.5 by 11).