Pentominoes are nifty. Or is it fun? Anyways, it's a challenging puzzle and I enjoy those. I made a set that are huge for scouts (each square is 8in per side), they were amused by the size, but not so much the puzzle.

What The Heck Is He Talking About?

Wikipedia (http://en.wikipedia.org/wiki/Pentomino) says:
"A pentomino is a polyomino composed of five congruent squares, connected along their edges (which sometimes is said to be an orthogonal connection)."

Whaaa? Basically it's 5 squares connected in random shapes. 12 shapes to be specific, roughly named after a letter (that if you squint in the dark at the shape it looks like that letter). The letters are:

Shape	Letter		Shape	Letter		Shape	Letter		Shape	Letter
	B			C			F			I
	L			N			T			V
	W			X			Y			Z

What Can You Do With Them?

Using the 12 shapes in any orientation (rotations and flips), you try to fit them into puzzle shapes without overlapping. The puzzle shapes are:

Rectangles
Puzzle	Name		Puzzle	Name
	3 by 20			4 by 15
	5 by 12			6 by 10
Squares
Puzzle	Name		Puzzle	Name
	Star			Donut
	Missing Corners			Button
Misc Shapes
Puzzle	Name		Puzzle	Name
	Checker Board			Thor's Hammer
	Cross

Other Puzzles

There are a second set of pentominoe puzzles where you use any 9 of the 12 to create a triple size version of the parts.

Triple Size Letters
Puzzle	Name		Puzzle	Name		Puzzle	Name
	B			C			F
	I			L			N
	T			V			W
	X			Y			Z