WOW I wouldn't make that into a child's quilt - just imagine the washing and loving it would have to stand up to.
Maybe if you scanned pieces of the silk gown and printed it to the fabric that can run through an inkjet printer?
Maybe echo the colors on the child's quilt?
I hate to mention this one but maybe copy the embroidery to red fabric and use that in the quilt?
I hope you show and tell us what you ended up doing with this.