Walkabout by Ann Lauer of Grizzly Gulch Gallery is an easy quilt that looks harder than it is. I have done a Carpenter's Wheel, and it's a good easy pattern, but Walk About is easier. It can be done with 3 main fabrics that contrast with each other. If I was going to attempt either of them with an new quilter, I'd have her cut the squares for the half square triangles a little larger than needed and she could sew around them and learn to cut the diagonals, and then learn how to square them up.
Do you speak their language? If not, you may find your young visitor eager to practice her English on you. Many Europeans are required to learn it in school. The neat thing about quilting is that learning it is mostly a visual process, and you can both teach and learn a lot with no words.