But his godmother Greenie who abhors vacuum and waste, has filled the vacant space by a few grams of silicon recovered from an ancient calculator KI-57 ...
As a result, Professor Bacon calculates faster than his shadow and intends to teach your children good values.
Funny multiplication and addition tables for kids from 6 to 12 years.
Addictive musical process.
Help and speed-up memorization.
Audio support in 4 languages ( EN / FR / DE / ES )
Setup to adjust max range level, interrogation mode et randomize.