Videomaker has an online article, "Alakazam! The Magic Gear Bag of Tricks" that addresses this same issue. They are much wiser than I and have included several items that never occurred to me. Although, as a teacher, I don't know that I would ever send any of my students out of my sight with a butane soldering iron. I'm not even sure what I would do with a butane soldering iron?
If you've never seen Videomaker magazine take a peek. On the front page of their website they have an offer for a free issue. My middle school kids found the articles a little beyond them. My high school kids were more interested and would read the issues I left laying around. I eventually asked our library to subscribe.
[Image: Reff, Michael. "eNews exlusive: Alakazam! The Magic Gear Bag of Tricks." Videomaker. Oct 2007. Videomaker. 27 Sep 2007