Do plan an alternate activity for the children while you sew. They can do without momma's eyeball to eyeball contact every waking minute and they will demand it IF you let them. They are fortunate that they can be at home, in the same room with you, but they don't need to sit on your lap or stand behind you unless you let them. Some children need to learn to amuse themselves and no, you don't need to feel guilty about that. Their teachers will appreciate their independence when they get to kindergarten and first grade also. Happy quilting!