I know there are several other Instructables about this using rubber band, cable ties or chain links.
This notebook is made with string and the method is different (and a bit more complicated, I admit).

After I made this I was very very proud of myself, and I wanted the world to see my creation! :-D

Step 1: What You Need

-2 Floppy Disks
-1 meter of cotton string
-about 50 papers (square, 9x9cm)
-Scissors
-Darning Needle
-a Hole Punch

I was lucky! I found notebook paper at exactly the right size, and it was cheap too.
If you have to cut it, it would be good to use one of those paper cutter machine things.
I just learned they are called "paper cutters" (THANKS!). Why didn't I think of that? It was probably just too obvious :-)

This is an opportunity to recycle used paper (one side printed/written, one side blank).

Step 2:

Punch holes into the papers.
Put the paper onto one Floppy .
Pull the string through the holes.
Align the ends of the string so they have the same length.

Step 3:

Pull each end of the string through its hole twice from the front to the back
(front is where the paper is, back is where the floppy is)

It has to go around every side of the corner once (see picture)

Pull tight and tie square knot.

Step 4:

We will finish one side first, then we do the other.

Pull one end of the string to the front and then through the second floppy

Step 5:

Now things start to get interesting.
It may look a little complicated but I'll do my best to explain step by step.
I think the result is worth it, cause it's pretty neat :-)

Thread string under the long strings on the back.

Step 6:

Pull string through the loop at the side

Step 7:

Pull string through the 2 loops at the spine

Step 8:

Repeat steps 4-7 at the other side
Pull tight, tie square knot.

Step 9: Finished!

That's it, we are done.

The sheets don't move as freely as they would with the methods in the other instructables because they are attached to the back.
But the cover can be moved without making contact with the pages. So they can't crinkle or get dog-ears

I made 8 of those yesterday . I would have loved to make more but I ran out of floppy discs :-(

I'll give them to the charity sale of our crafting circle on Whit Monday. I hope they sell well.