These are awesome little devices for modern settings. Since the magnesium can be readily used for more then just lighting campfires (flares, fireworks, as a chemical, etc) these are truely cool. Go to Comment
Well, these things are far too useful to leave at home.
This + Steel Wool = Firestarted.
This + matches,electrical tape and a little copper wire, primative detonator.
This + Graphite lead from click-pencil = Temporary Carbon Arc Lamp.
Can be taken apart to obtain 6 1.5 volt (sorta) short-life batteries, allowing you to generate anything from 1.5 v to 9 in 1.5 volt increments.
Two stuck together = dangerous handwarmer.
This + two electrodes and water = hydrogen/oxygen generator (in small quantities).
etc,etc. Go to Comment
Will ignite readily if exposed to sufficent voltage (surprising little)
Can be used to make Thermite in addition to other ingredients.
Shredded it can be dropped into electronics to short circuit them.
And of course, scrubbing pots :) Go to Comment