Warm Wishes I would imagine would be a great beginner's quilt. Free instructions on Quiltmaker.com

My daughter came to visit in October to learn to quilt. I had recently bought another sewing machine and told her she could have it. I had bought a jelly roll for her to practice 1/4 inch seams which is IMO the most important thing in piecing quilts. I helped her with that and discovered I did not like the jelly roll sewing. Gets twisted at the ends of the rows. Showed her how to do straght line quilting, how to sandwich the quilt(I use spray basting) and it went a lot easier with two people. Also showed her how to bind (I sew 2 1/2 " strips to the back of quilt and bring it over to the front, all machine stitching) And showed her a few tricks with the machine, like the self threading feature and self cutting. The back stitch button seemed to work better for her. She has since made several quilts at home, sends me email pics on her i pad and we have long conversations about how to do certain techniques. I already told her when I die, she can have the contents of my sewing room. That being said, I don't have to worry about who gets my fabric and I feel no guilt about buying more fabric. You and your girls should have a lovely visit.

9 Patch is so versatile, I love a double 9 Patch for a beginner or an on point 9 patch

My granddaughter currently 12 has been sewing by hand for a couple of years making pillow cases for mu husbands "knee" pillow & wallets ect. Now that Gammy has started learning to quilt she has taken that up too. I have to say I have made 3 quilts from kits so far...but she is on her 2nd little quilt from her own mind no kit, no pattern, she is good. Makes her Gammy look bad lol. She is waiting for me to finally give her my old sewing machine. So I guess I need to break down & start using one of my other 3 old machines and give Ol Faithful to her.

I think rail fence is such an old pattern that if it was me I would choose turning twenty a pattern with straight lines but newer looking.

Warm Wishes is a rail fence, just with solid blocks between. Easy and fast.

Double Irish chain was my first ones and I loved it!!

Disapearing 9 patch is easy, but it looks harder than it is.

I think this pattern is one of the best for a beginner.

Your daughters are a little older than I thought. ;) That's good. They will have the attention span to finish any quilt they start. You just need to concentrate on technique and not worry too much about picking patterns or fabrics for them. I think once they see some of their quilts come together the learning will be pretty quick. Enjoy your visit with them.
Rodney