how do I sew the fringe on squares already fringed?

just put your squares together with back and batting sew an X on it and sew them all together with stitching a little past where the clips are for the fringe.

I had a fleece quilt kit once that was pre-fringed... We put a little piece of scotchtape across the fringe and it contained it enough that it didn't flop around and under the needle. :)