I was looking for another thread I wanted and got side tracked by yours! I taught a 9 year old girl to do my confusion crazy quilting. It is basically the same as the crazy crumb method. It was easy for her and we made several projects with it. One of them was a drawstring purse. You just need two rectangles or squares and hem the top leaving space for a string and sew the two together like a pillowcase.
It was really easy for Niccole to do! She took her projects to the fair and got a gold ribbon! If she had been 10 instead of 9 she would have gotten to go to the state fair with her projects!
Crazy quilting on the machine is a great way to start a child on the machine because with my method or the crazy crumb method you don't have to have straight seams.
As far as the iron just have the mom or you do the ironing with or without the girl helping.