Fan books. I found these while looking for something else. As usual.
I made six identical shapes using the autoshape function in Publisher and copy-and-paste. Then I cut them out, put them in a pile and punched a hole in them all. Finally I fastened them together with a butterfly clip. Simple.
I mentioned on Twitter the other night that I had thought of using these for House and Home. Make house shapes, fasten them together and each house shape can house the description of a different room. I'm sure you can think of lots of other ways of exploiting them.
PS Congrats to Blogger for importing the top photo the wrong way round.