Some monofilament can be scratchy, so do some testing first.
You could also SITD around the color block areas, like all around the contiguous black area etc. If you are worried about the stitching showing in then adjoining color, you could stitch 1/4" or 1/8" in from the seam.
You can also do cross hatching or stippling with matching thread, changing it from area to area. A 5 year old is going to love anything you do with Mario!
Last edited by QuiltnNan; 01-03-2016 at 08:44 AM.
Reason: language