Here is a screen shot of a FREE file folder for sorting Farm animals vs. Zoo animals. You just glue the two pages on each side of a file folder. Then, laminate the whole folder and put pieces of hard velcro in the blank spaces of the pages below.
These are the pieces that the student uses to sort onto the farm or zoo animal pages above. I usually laminate these pieces and put velcro on the back of them so they can be sorted onto the pages above.
Here is an example of an adapted book from File Folder Heaven that I am currently using in my classroom. I have it at a Quiet Reading station for some of my beginning readers. Students have to match the picture and underlined word on each page.