You know, they are your kids and they know how much work goes into each quilt. Don't worry about it because it is coming from you and from your heart, they know how special it will be! I know exactly how you feel about time, I need time management classes, but not sure how I would find the time to do them, lol. Have a Merry Christmas and don't let the stress get to you!!!
As for the zipper...I um...well, don't do zippers, sorry!! Good luck!!