Even before real school started, I think many of us in Europe played with base ten blocks. As far as I know they are always centimetre-sized, so the 1000-cube i

Even before real school started, I think many of us in Europe played with base ten blocks. As far as I know they are always centimetre-sized, so the 1000-cube is a litre. https://en.wikipedia.org/wiki/Base_ten_blocks https://en.wikipedia.org/wiki/Base_ten_blocks