A dominoes-style mathematical operation game is provided including, but not limited to, a plurality of dominoes, each domino having a top face in the bottom face. The bottom face of each domino has a pair of equally sized sides each with unique combination of an at least a number indicia and a mathematical sign and possibly a physical representation of at least one of addition, subtraction, division, multiplication, equality, calculus operations, comparison, and algebraic equations.

A method of playing a learning game having game pieces with a playing face divided into first and second sections, the first section displaying a first number and the second section displaying the first number, a mathematical operation, and a second number, the method including taking turns to place a game piece on a playing surface adjacent a game piece already on the playing surface in which a numeric value of the first number in the first section of the game piece or the numeric value of the result of the mathematical operation in the second section is equal to a numeric value of a first or second section of the game piece already on the playing surface that is not adjacent another game piece.

A method of playing a learning game having game pieces with a playing face divided into first and second sections, the first section displaying a first number and the second section displaying the first number, a mathematical operation, and a second number, the method including taking turns to place a game piece on a playing surface adjacent a game piece already on the playing surface in which a numeric value of the first number in the first section of the game piece or the numeric value of the result of the mathematical operation in the second section is equal to a numeric value of a first or second section of the game piece already on the playing surface that is not adjacent another game piece.

A method of playing a learning game having game pieces with a playing face divided into first and second sections, the first section displaying a first number and the second section displaying the first number, a mathematical operation, and a second number, the method including taking turns to place a game piece on a playing surface adjacent a game piece already on the playing surface in which a numeric value of the first number in the first section of the game piece or the numeric value of the result of the mathematical operation in the second section is equal to a numeric value of a first or second section of the game piece already on the playing surface that is not adjacent another game piece.

The present invention includes a set of stacking blocks designed to resemble the Arabic numerals 1-10. Each number block is height proportional to its value, and they can be stacked vertically. This feature allows students to see the relationship between numbers, and discover math concepts as they stack or play.

The present invention includes a set of stacking blocks designed to resemble the Arabic numerals 1-10. Each number block is height proportional to its value, and they can be stacked vertically. This feature allows students to see the relationship between numbers, and discover math concepts as they stack or play.

Devices for providing language-like abilities for dogs. Using polygonal layouts, audible, scent, visible and other cues, the devices provide an efficient and novel ability to communicate with dogs in a granular manner. Devices for capturing and releasing scents are provided. Novel button designs and functions are taught with particular suitability for animal training.