What you need:
-A CD or DVD (or Blueray or something else)
-A piece of paper (I prefer 297mmx210mm)
-a table (or other hard floors)
Step 1: Place the CD on the Paper
Push the CD one cm away from the end.
Step 2: Make the First Folding!
Step 3: Foldings No. 2+3
Step 4: The Last Foldings...
Then fold the last rest over the CD.
Step 5: Last Step!
Open the last fold again and try to push it between the 2 foldingstripes from step 3.
Step 6: Finish!
(I hope, you understand, what i've mean. My english isn't good, sorry. But the pictures can help you!)