Watching Star Trek with the kids is a great experience! I hope you get them hooked.
When I did a similar thing to what you're doing, a few things that jumped out at me were :
- I couldn't believe how GREEN the corridors, uniforms etc were. Green must be the first thing that gets washed out as film deteriorates or something.
- Sulu was hardly in the show at all.
- The approaches of the various producers were so different, it was like four different shows across three seasons.
- DeForest Kelley and Leonard Nimoy were the real stars of that show (sorry Shat-fans).
Must do a block-run of TOS again soon. Kids are heavily into Next Gen at the moment, and it's a wrestle to get the remote.
Keep posting your thoughts as you go.