This toy consists of two types of brick. One has Projections and the other type has grooves. This brick toy can be piled up as well, like normal brick toys. Also can be constructed more sterically by the Projections and Grooves. 5 types figures for Projection Bricks, and 4 types for Groove bricks.

The Figures
SQUARE, RECTANGLE: They become the base parts to construct bricks
SEMICIRCLE: They become tires when constructing vehicles.
TRAPEZOID: They become legs of a robot, or wings of aircraft.
TRIANGLE: They become a roof for building, or face of a robot

The Sizes
Through the user test, and easy to handle with Kid’s hand, 70mm based size for each length of a side has been selected.