Gosh, yes, I remember Mr Tomkins from my undergraduate days! It's much more on relativity than quantum physics, though, IIRR. I don't know anything about the Stannard updating but it sounds like a good thing. Definitely a good thing to have. My one reservation would be that, IIRR, it was a bit in-joke-y - more like the kind of thing that was fun and funny if you'd already had the course with the mathematics, than a good way to learn that stuff in the first place. But in the worst case, your DS's curiosity should be fed by it.
