Originating from the Bronze Age cultures of China, Indochina, and Indonesia, this melodic percussin instrument plays an essential role in asian orchestra and ceremonies
The colored circles help pupils to understand sets and analyze 2-condition relationships with Venn diagram made with 2 circles, or 3-condition relationships with Venn diagram made with 3 circles.
100 magnetic-tile pieces (4 large squares, 11 right triangles, 20 equilateral triangles, 50 small squares, 15 isosceles triangles) : clear color plastic ; in box 41 x 29 1/2 cm