Santa, baby!

Santa Claus ("Christmas Present") by Seiji Nishikawa Folded from 6" square.  Diagrams originally found in Origami Tanteidan magazine #64

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This has long been a favorite of mine.  A good part of its charm (aside from the ease of folding) is that you can open the flap at the top of the sack and put some hidden goodie inside.

I've folded over 50 of these so far to pass out to the kids at the gym (Japanese caramel and yogurt candy inside Santa's sack):

Only takes about 3 minutes to fold.

 According to Anne LaVin, diagrams are available for purchase download at the OUSA website.

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Anne's Origami Bits