This set includes five large sixty-sided dice, each in a different color. The letter distribution on the dice follows the frequency of English language usage, making them well-suited for word games. The unique geometric design ensures mathematically fair rolls. Each die measures 36 mm (1.4 inches) in diameter.

This sixty-sided black die features white letters weighted by their frequency in English, making it well-suited for word games and educational play. Its mathematically fair, unique shape ensures balanced randomness. The die comes with a complimentary velvet Dice Lab bag for storage and protection.

This set includes 84 magnetic foam puzzle pieces and combines art and math to stimulate creativity. It features flowers, bumblebees, snails, ladybugs and more, and is simple for young children, but can challenge older kids and adults. It has various solutions and can be used along with the original. A Classroom Pack ($39.95) with 234 non-magnetic pieces is also available. Launch date: January 2006.
— “All of our puzzles contain multiple brain teasers to solve, but the real idea is to explore on your own,” Owner Robert Fathauer of Tessellations told TDmonthly. “The educational content in our puzzles is strong, so they appeal to parents who are looking for toys that will help their children develop math and problem-solving skills. Professionals with a math and science background … find them more interesting than mass market toys.”

Making Faces is a unique tessellation puzzle in which a face is formed where four square pieces fit together. There are three different types of pieces, allowing over 1,000 distinct faces. What's more, if a face is viewed upside down, a different right-side up face is seen. It is both weird and cool. The puzzle comes with instructions that include several brainteasers plus a game using the pieces. Four reproducible worksheets cover translational and rotational symmetry in tessellations, the mathematics of combinations, and drawing two-way faces. The 120 chipboard pieces come packaged in a plastic jar.