What a treasure that would be, to use the fabric from the baby's DGMs wedding gown.
Not knowing how large your scraps are, it's hard to know what you have to work with.
You might have enough, or could add other new fabrics to it.
By chance do you have something from your wedding that could be included?
Some ideas ...
* Christening Gown ... these and add some
* Baby hat, dress for a girl or shirt/pants for a boy.
* wall hanging or framed item ... with baby's name, DOB, time, weight, height, parents etc. machine or hand embroidered or cross stitched in the centre, then use the other fabric around the edge.
* Baby quilt (obvious!)