The 3 rectangular blocks on the top row represent 3 basic colours red, yellow and blue. The 3 semi-circular blocks on the left column represent 3 different shapes triangle, circle and square. To play, teacher or parent can use any one of the 3 semi-circular blocks and the 3 rectangular blocks, and ask the kid to match the square blocks with the colour blocks. Or, to place all 3 colour blocks and all shape blocks on the board, ask the kid to place all 9 square blocks at the right positions. A perfect toy for shape learning, colour recognition and logical thinking skills development.