Simultaneous change of two dimensions and weight. Correlation and concepts: thick - thin, thick - thicker - the thickest, thin - thinner - the thinnest.
Includes
- 10 cuboid blocks, 20 cm wide.
Features
- Material: Solid wood with brown varnish;
- Subsequent blocks differ in the size of their base: the smallest is 1 x 1 cm, the largest is 10 x 10 cm.