These sturdy plastic pieces can be used to make thousands of geometric designs and are a great source for stimulating and challenging problem-solving explorations. Includes five sets of tangrams (one each of five colors) and an activity sheet. Explore geometric properties such as shape, size, congruence, similarities, and symmetry with Tangrams. The seven-piece puzzles come in red, blue, green, yellow, or orange and once assembled, the square, parallelogram, and five triangles make a 10cm square.