It is really cute! I think the suggestion of SID around each block and diagonal stitching in all the star blocks is a good idea. On the other blocks, I would stitch around each of the main characters, machine or hand quilt. It would be a little time consuming and a bit of fussy work, but would sure make the characters stand out even more. On the border, you could "echo" the prairie points 2 or 3 (or more?) times.