"Raven's Progressive Matrices" refers to the number of non-verbal intelligence test
The idea of the game: you will be a series of emojis and you're trying to learn.
Stereogram: fun for the whole family, fun learning, training of the mind
Find out what's waiting for you to come, and what to prepare yourself and people close to you?
It is necessary to make the word of the letters, but one of the extra letters.