Janome Gem I have 14 children and about as many machines (many vintage) but this little machine is what I teach them on. I assume you are teaching them quilting. My youngest is currently just nine. The youngest I taught was 3 and she is now an excellent quilter at 13.
The Janome Gem is a 3/4 size machine but you can free motion on it, use a walking foot, piece with a quarter inch foot. I have 5 friends that use the Janome Gem as their main machine for quilting and they never bought a full size machine because they feel they do not need it. They made beautiful quilts on it up to Queen size.