I found this great DIY idea on Buzzfeed awhile back. I think this idea is great because it uses things you already have in your home that are old and are soon going to be hitting the recycling, but alas now they are getting reused!
They used what seems to be quite a fancy base for their stool. It looks a bit too complicated and time-consuming for me, so if I were to make it I think I would give that a miss. Perhaps just pop a piece of hardboard on the bottom which is the same size as the magazines and that would hopefully do the trick.