Applique has been machine-embroidered on by dropping the feed dogs and guiding the fabric by hand. (And yes, all of the seams & border are straight ... it looks wonky from my bad photographic skills)
I am pretty happy with the result. Thankfully I was able to heat-set the fabric crayon at the same time as fusing the applique to the backing fabric. That was a big relief. If I do something like this again I'd:
a) use a different applique backing as the one I've used left a textured cross-hatch appearance to the fabric
b) use a small amount of dark crayon to better define the edges, and create more depth in the applique shapes.