My experience with children and color is that they will knock your socks off with their choices.
I have also noticed that even children with absolutely NO experience with fiber, fabric or sewing have a great nose for the BEST fabrics (another reason not to set foot in JoAnn’s again).
This quilt was designed by an 8 or 9 year old. She laid it out. I pieced, quilted, and bound it. She won the collaboration and quilt in a fundraiser for her school.