I just made a little ball of wool batting, and pinned through it into the belly. Then I sewed a tiny stitch on the inside by the pin, then on the outside of the wee ball, all the way around...That wasn't very clear, was it? Sorry...if you imagine from the inside the wee ball would be sewn onto the body fabric by a web of stitches....aacckk...it's getting worse
Just give it a shot- it's easier than it sounds LOL