Get her a vintage 3/4 machine like a Singer 185J or a 99. They both are drop in bobbins, easy to work on and parts are readily available if something ever does happen. I did a machine for one of our members daughter for her Christmas present and she really enjoyed it. She was 8yo and it was a perfect fit for her and it is built like a tank so she can use it like she stole it!!
Billy
Custom Barbie Pink 185K
[ATTACH=CONFIG]242851[/ATTACH]