I started at age 5 w/ doll clothes from Mom's scraps - thought they were fabulous, but see them now & just laugh.
I'd begin with a simple project she can finish quickly - how about pillowcases - many tutorials available on Utube & this site.
Another idea - cloth napkins in pretty fabric.
If she likes these, then move on to a simple 4 or 6 inch squares pieced lap quilt.