I'm in the same school with Mrs M. To me the pictures of wildlife appliqued randomly over your beautiful strippy quilt look like they were an afterthought. I love your stippy quilt and I love your wildlife fabric but seeing it the way it is pictured upsets my inner sense of "chi" somehow. I can't pinpoint it exactly. I suppose if it was quilted all over it would probably look great though and the afterthought look that initially struck me would probably completely disappear. I don't mind modern but I am more orderly so random doesn't float my boat.
However, it is your quilt and you know what your grandson's likes and dislikes are, I am sure he will love it no matter what you decide.