"CalculoDingproposes to children aged 5 and over to learn addition and subtraction through 15 games inspired by poker, memory, black jack, etc. Mental arithmetic card game from primary school to CE1, allowing to practice addition, subtraction, play with doubles, sequences, units and tens, even and odd numbers.The rules are simple and quick to implement, the cards are coloured, the units are represented by fruits and the tens by birds.1 booklet of 32 pages detailing the 23 games included, 36 cards.