You can buy pretty cute toy sewing machines nowadays like this:
However, once upon a time, Singer made a real toy LOCKSTITCH sewing machine:
|That is a shuttle type bobbin|
It makes a perfectly nice, even stitch which is a full lockstitch and will actually hold the fabric together. It makes me mad whenever I see those chainstitch machines advertised as being something you can "make" things with. The only thing you will ever make with one of those is a mess!