That will be a very nice baby quilt when it is ready.Will you share with us, when it is ready?
These designs are quite cute. I hope you post the others as you make them! I learned a similar trapunto techinque to do by machine. You put the higher loft bat under the fabric instead of on top of the fabric. Then after you stitch, you trim the higher loft batt as close to the stitching line as possible. Then you use regular bat to make the quilt and quilt close to the outline as you can so you end up with two layers of bat under the design. I ususally do a small stipple around the design which helps the design pop up.
The reason I chose to use the batting on the top was to stop lint getting into the embroidery machine. I will bat the whole quilt when I am at that stage.
Looks great so far. Would love to see all the blocks as you go along.