Great! I saw the same rubber torpedoes we used, in that video. Kids always learn very fast and usually pick the skills up way before the adults in the open water classes. The hard part is teaching them to be safe and to dive within their personal limits. I think the most important stuff to teach now would be good technique in breathing to prevent an embolism. i.e. don't hold your breath (It doesn't take much for someone to get an embolism, easily done in a pool). Secondary would be just getting them comfortable but that will come naturally with experience.
Once they have their open water take them out diving whenever and wherever you can so they can get experience and learn what their personal limits are, how to read the wind, the surf, and the currents without even getting in the water. For now snorkeling is pretty good for that. That's the kind of stuff that I feel is under-emphasized in open water training. Unlike PADI, SSI and NAUI require a certain number of dives before attempting some of the specialties and the advanced open water so the divers in those courses are usually somewhat comfortable underwater. Not always the case with PADI.

I really miss diving. Now that I'm finally home weekends I want/need to get out diving more (I live near San Francisco) but most of my gear is still in Florida. Trying to get friends I know that still live out there to ship it to me. Not being able to jumpseat anymore definitely makes traveling harder. Got stuck in ATL last time I tried to get out there.