The Computing-in-head is with the Domino Game practiced. Highest difficulty - up to two basic operations per domino and parentheses.
The dominoes are made from local beechwood in Germany. Each block is checked when sorting by hand for quality. The colors are also manufactured in Germany. They are non-toxic and sweat and saliva.
Dimensions: 200 x 165 x 30 mm
8 years
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