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Geometric Brain Teaser Puzzles

   
Four Tricky Two-Way Puzzles
$9.95
Turn a square into a triangle? How is that possible? Each of the four squares in this set can be transformed into a different geometric shape. See how fast you can solve them. Ages 8 to adult.

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Four Tricky Two-Way Star Puzzles
$9.95
Even a square can become a star! In this set, four squares are rearranged to form four different star shapes. Ages 8 to adult.

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Four Tricky Tangram Puzzles
$9.95
The Tangram is just the beginning! In addition to the ancient Chinese classic, this set includes three other Tangram-like puzzles. A Japanese puzzle that actually predates the tangram by half a century, and two more recent designs. Ages 8 to adult.

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TangraMagic
$3.95
This foam puzzle consists of the ancient Chinese Tangram plus three additional pieces. Remove all the pieces and replace them without the magic square to fill the frame again! Plus fifteen original Tangram paradoxes. Ages 8 to adult.

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The Puzzle of Pythagoras
$3.95
A foam puzzle inspired by the Golden Ratio, which fascinated Pythagoras and his followers. One large pentagon can be rearranged to form different combinations of smaller pentagons. Loaded with fun geometry content! Ages 8 to adult.

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Pentominoes Plus
$3.95
The classic Pentominoes, plus the other polyominoes made up of one to four squares. A different color of foam for each type of polyomino. There are nearly endless challenging brain teasers based on these intriguing shapes!

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Wintertime
$3.95
This 10-piece foam puzzle, created originally by famed puzzle designer Stewart Coffin, contains all of the shapes (known as polyhexes) that can be made by connecting 3 or 4 regular hexagons in edge-to-edge fashion. The instructions show 8 different silhouettes with a wintertime motif. The challenge is to create these using the puzzle pieces. Ages 8 to adult.

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Wintertime - magnetic version
$4.95
The same puzzle, with magnet backing on the foam pieces. (The above choking warning applies to this product as well.)
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Squared Squares
$3.95
Squared Squares contains 48 foam pieces, each of which is a square. All 48 pieces form a large square, and all of the pieces of each color form different smaller squares. But that's just the beginning; seven more brain teasers will really put you to the test!

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Squared Squares - magnetic version
$4.95
The same puzzle, with magnet backing on the foam pieces. (The above choking warning applies to this product as well.)
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Pentominoes Plus - magnetic version
$4.95
The same puzzle, but with magnet backing on the foam pieces. (The above choking warning applies to this product as well.)
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Cubed Cubes
$12.95
Cubed Cubes is a brain teaser puzzle that teaches students about rectangular solids and the cubic numbers. The foam pieces form red, blue, and green cubes, each of a different size. In addition, all nine pieces together form a larger cube. The puzzle is based on the mathematical curiosity that the cubes of 3, 4 and 5 sum to the cube of 6. The instructions include several additional three-dimensional puzzles to solve using the same pieces. Also included are classroom worksheets on the volume of rectangular solids and cubic numbers. Grades 2-12.

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The Irrational Puzzle
$19.95
This set contains four cubes dissected four different ways to form a variety of geometric solids. The instructions contain seven brain teasers in which different three-dimensional geometric shapes are formed with the pieces. This puzzle makes use of the fact that the face diagonal and space diagonal of a unit cube are the squares roots of 2 and 3, respectively, to introduce students to the concept of irrational numbers. Three reproducible worksheets cover the history of the square root of 2, the discovery of irrational numbers, and the Pythagorean Theorem. Contains 11 geometric solids made from soft, durable, and nontoxic foam. Cubes measure 2.5" on a side. Grades 3-12.
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Happy Cube Six-Pack
$19.95
A classic, created in 1986 by Belgian inventor Dirk Laureysens, this puzzle is simple yet challenging. There are six pieces in each foam color, each group of six different, and each forming a cube when assembled in the right order. In addition, there are many other brain teasers using the same pieces. A personal favorite of Mathartfun founder Robert Fathauer.
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Star Puzzle - Wood
$10.95
This beautiful geometric form is known as a stellated rhombic dodecahedron. This puzzle is moderately difficult to solve. 4 1/8 in x 4 1/8 in x 1 1/8 in.
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Polygony
$19.95
Polygony consists of 23 pieces that are rearranged to form four different regular polygons: an equilateral triangle, a square, a hexagon, and an octagon. The pieces are made of magnetic foam so they can either be used on a flat surface or a magnet-receptive vertical surface such as a file cabinet or some white boards. Classroom activities and blackline masters are included, with four activities designed to address specific Common Core State Standards for Mathematics for 8th grade and high school geometry. This fascinating puzzle will challenge the spatial reasoning abilities of even the most gifted students and adults. Ages 12 and up.
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Magnet-Receptive Board
$4.95
Magnets will stick to this 9" x 11" board, which is ideal for playing with magnetic puzzles at home or traveling. Pieces will stay in place, making for convenient use on your lap with no need for a table. Comes in a zip-lock bag to prevent puzzle pieces used with it from being lost. This board is well-sized for tangrams, Four Tricky puzzles, Mania puzzles, and Brain Snacks, but a bit small for Kites & Darts or HexaPlex.
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Deluxe Tangram Set
$14.95
Set of two magnetic tangrams, along with a 9" x 11" magnet-receptive board, and a book on tangrams by Ronald Read. The book includes 330 tangram patterns, including some that use both tangrams together. Comes in a zip-lock bag for convenient storage and handling. Tangram colors may vary.

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L Rep-tiles Set
$4.95
A self-replicating tile, or "rep-tile" for short, is a tile that can be broken down into smaller copies of itself. This magnetic foam set contains 22 L rep-tiles, in three different sizes. The set comes with a sheet containing several puzzling questions.
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