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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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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Four Tricky Two-Way Puzzles
$7.95
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
$7.95
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
$7.95
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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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
$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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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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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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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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