Oh My Stars!

Modular Star.

Notice the star and triangle pattern.

My college Math professor helped us build this modular origami star during the last day of class in 2007.  Each of the ten students folded five origami apiece, and the professor assembled them into the form shown above.  We then played a mathematical game to determine who would be the lucky owner.  Guess who won?

Stiff card paper was used for the individual pieces (50 in total), which is essential for it to hold its form.  The actual assembly is quite easy, simply "swizzle" the flaps into the star and triangle pattern.

Here is a link to the folding instructions:
Curly Star Folding Instructions

This website has plenty of other modular origami folding instructions, ranging from easy to very difficult:
 http://www.origamee.net/diagrams/diagrams.htm