I am sure if you have been around for awhile, you probably have a bunch of old VHS cases laying around. Instead of leaving them for utter death, you should consider recycling them into covers for spiral notebooks as this one user on Instructable did. #REMAKE #SAVEEARTH
You can get just about anything flat spiral bound at copy stores or you could buy a machine to bind things yourself. But with the low cost of pre made notebooks and a do it yourself attitude I find it appropriate to take a pre-made notebook and replace the cover. This instructable will tell you how to do just that.
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