How good of you to work with these children and help them learn to sew!
I agree with the others that poly batting is more "shifty" for quilting.
I don't use polyester batting very often, but when I do, and am using spray baste,
I spray the fabric, not the batting.
For the kids, spray basting may not be a good idea because of the smell,
and potential breathing issues it may cause them.
Besides, some parents may be less-than-happy that you would expose them to the chemicals!
To avoid the binding issue, the birthing method, would be realistic for the kids.
Then turn and have them put a few ties in, to stabilize things.
One word of caution ... with your intention of giving these to a nursing home (or wherever?),
you might want to check with them first, as to any guidelines.
Some have very specific requirements as to the fabrics, battings, etc. that can be used.
Last edited by QuiltE; 11-03-2017 at 04:31 PM.