Years ago, possibly even 10 years ago, I purchased a laminator. I chose the low tech version and I have never been disappointed. It seemed like a large purchase at the time but I have used it so much over the years and lent it out to many others in need of a laminator. We have made many, many books and projects over the years and enjoyed keeping these laminated and comb-bound.
Here are some of the other things that we have done with it:I have made a variety of flash cards over the years from sites like Sparklebox and small Art cards using these (and ones like them) from Dover.
I have made a variety of games over the years like the ones from Adrian Bruce.
I have subscribed to Evan Moor Teacher Filebox and made a variety of materials.