This idea is quite simple, I like it because it's "green".
You can find the Italian version here: http://fabuland.wordpress.com/2012/02/28/tutorial-come-creare-blocchetti-per-appunti-riciclati/
Do you remeber of the sheets you have used only on one side? Do you remeber those ugly photocopies that that bad machine won't make clear and well done for you? Don't throw them away! Give them another life. Save trees.
paper sheets used onnly on one side
vinyl glue (or white glue)
an old magazine
Step 1: Preparing the sheets
Take the paper sheets and cut them in four. You can cut with scissors or cutters, or just tear them apart. They doesn't need to be accurate.
To measure, you simple flod twice the paper.
Keep the straight sides and the written sides all on the same part.