I'll second Craig recommending a Deep Space, rather than a Superfly or Supernova. It's an older design, but it's still a very
capable kite and will be more forgiving to someone just starting out.
If you borrow a sewing machine, tell them the type of fabrics you'll be sewing. It will need to be strong enough to handle webbing for the nose and have a triple zig-zag for the seams. There are other people here who are more experienced than me at this, so I'll let them add anything else, such as best needles, threads, etc., but you could do worse than looking here