Here is one of many variations:
+---------------+
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| | | 1. Make a crease in the middle
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+---------------+
/+\
/ | \
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/ | \
|-------+-------|
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| | 2. Fold the top corners to the crease
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+---------------+
/+\
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/ / \ \
/ / | \ \
/ / \ \
| | | 3. Fold the diagonal edges to the crease
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+---------------+
4. Repeat several more times if desired
/+
/|
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/ | 5. Fold in half on the original crease
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/-----+
\ /
-
/+
/|
/|
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/ | 6. Fold the top angle in half one last time and repeat on the back
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/| |
/ | +
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\
This type is
normally called a
dart. Throw with the
point in front and the
wings
spread, holding the bottom
flap between your
thumb and
forefinger.