I use strips of batting in quilts when I strip quilt. I also use them in smaller projects like pot holders, wall hangings, etc.
There's a slight difference between stretching to make sure there's no wrinkles and stretching to the point of distortion. As long as what you're doing is working for you then it's okay.
Hang them on a wall, use them for gifts, donate them to a children's home, or put a doll or stuffed animal in them and donate them to a hospital.