These are great for medieval props!

Step 1: About

The Caltrop was used by many in the Middle Ages. When thrown, a spike always landed pointing up. It was used to slow down the enemy. It was also used in WWII. Now, they are used to deflate tires.

Step 2:

Make two thin foil bars

Step 3:

Twist in a way that they stay together and whenever thrown a spike points up.

Step 4: Done!

Don't step on it!
<p>This object also has a peaceful use: it holds wood projects aloft for application of finishes for an all at once job that will dry without any appreciable smears. A child's metal jack will also do the same if your caltrops are busy on the battlefield. ☺</p>
<p>Makes perfect sense. I've often thought that people busted for possessing an arsenal of weapons were really just craftsmen. I mean, hardly a day goes by without a new Instructable on how to craft some deadly thing or other.</p>
:D True. Pens make great on hand weapons. I'm studying Roman weapons for a History Project.
Definitely. Mine would crumble under weight.

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