Putting the thread on the bobbin is the coolest thing to watch for those who have never done it.
My opinion, Basic Machine, how to change stitch lengths, create zig zag, how to thread, make a bobbin :) sew a straight seam, even if using a light stripe to follow, I wouldn't get too hung up on the 1/4 seam as long as they are all the same, can teach that later and why. Mark and cut, some adults don't like rotary cutters, I'd be a wreck to let a little one loose with one:) can make a pattern out of news print, freezer paper, etc. How to use a tape measure, what the markings mean.
Apron, Pillow case, Pillow, Drawstring bag, easy and quickly done.
Good Luck and have Fun !!
Oh goodness have a 9 year old in my world, will be watching for all the good advise here :)