Your quilt is really pretty! I'm sure your grandson will love it a lot!
May I make a suggestion on quilting. One of my relatives made a baby quilt for my oldest out of flannel. Really nice. And it was used a lot and loved a lot. But, everytime I washed it, I had to get needle and thread and restitch seams.
My suggestion is, on quilting it, if you have a double sided blanket stitch, please stitch over every seam. That way every edge is caught. Otherwise, everytime it's washed, there will be some fraying on the seams.
I now own a serger, so every flannel quilt from here on out will be serged!