Montessori Aids. Brown stairs
Description
Simultaneous change of two dimensions and weight. Correlation and concepts: thick - thin, thick - thicker - the thickest, thin - thinnest - the thinnest. 10 cuboids blocks with a height of 20 cm; made of solid brown varnished wood; subsequent blocks differ in the size of their base: the smallest 1 x 1 cm, the biggest 10 x 10 cm.