1) buy inexpensive posterboard...comes in a myriad of colors now, and usually for under a buck or $2
It's inexpensive (mine were at the only small town store, so from $.79-1.29 for mine.) But cut into strips, you are getting mini albums at RIDICULOUSLY cheap price, and there are different colors to choose from, so you have a lot of options!
And now a double sided one, on the larger side, about 7"x7" approx. This one I made for my MIL and FIL as a thank-you for letting us stay so long!!