I am using some Mountain Mist poly on a charity quilt right now and am liking it. It is easy to sandwich in the quilt, seems consistent with no thin spots, my Juki quilted right through it without a single broken thread. It is giving a nice puffy, lightweight result and was inexpensive. I think it is fine for a baby quilt too. The package does say max quilting spacing is 5". Just for reference I usually always use WArm & White cotton on my regular adult quilts.