Recreational Mathematics(2)
These organizations were held between successive editions of the most important international conference dedicated to recreational mathematics:
Also noteworthy are the thirteen editions of the Portuguese Championship of Mathematical Games:
It is on sale the Mathematical Games Kit:
Here is a speech by the Minister of Science and Technology Mariano Gago (3rd edition):
A video about the CNJM9:
The number of participants shows the success of the initiative (first seven editions). Nowadays, the number is stabilized.