I just asked my expert. She's an 11 year old too.
Here's Olivia.
Hi! I started off with a Singer 101, I enjoyed using this machine VERY much!!It makes a beautiful straight stitch. Of course there's a chance of her wanting a fancy stitch, if so I recommend a Singer 401 because it has a selection of nice stitches and it sews very well. Another great sewing machine for cool stitches is a Touch-And-Sew. a great zig-zag stitch and straight stitch as well as fancy stitches. When you check this write back please!
Olivia 11 year old expert