Here are 30 sets of Tangrams so each child can explore geometric properties such as shape, size, congruence, similarities, and symmetry. 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. The 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 30 sets of Tangrams (six each of five colors) and an activity sheet, in a clear plastic jar.