$tars can be made in either a 5 point or 6 point configuration and can use any denomination of bill.
If giving as a gift, an Origami Triangle Box (http://www.instructables.com/id/Origami-Triangle-Box/) or Origami Gift Box (http://www.instructables.com/id/Origami-Gift-Box/) would make the perfect vessel to present your gift in.
Hopefully the pictures explain well enough how to fold and connect the units but if you get stuck my commentary will be below the pictures. If you don't need to read it then don't, explaining origami is weird and will probably just get in the way if you understand the pictures already.
-5 to 6 bills, the the crisper, less ghetto, and highest denomination the better
Bring the bottom edge up to meet the top edge and fold in the middle, essentially creasing the middle of George's face and messing up his nose, sorry George!
Unfold the bill.
Fold the bottom left corner in to meet the middle crease.
Bring the right side over so that the point touches the left corner that was folded in. The point should also line up with the first fold which was the long middle crease.
Flip the bill over so that the folded down corner is in the upper left.
Fold both the upper and lover right sides in to meet at the middle crease.
Fold the right sides in again to meet at the middle crease.
Flip the bill over.