Un juego de siete diferencias

Un juego de siete diferencias
 

Is this a card game?

Sounds like spot the difference to me.

I don't know in English. Usually there are two apparently equal drawings. You must find the differences you can find between the two drawings. Usually, there are seven differences, but this number is able to change. :)

http://www.actiludis.com/wp-content/...-7-errores.gif

Yep - Spot the difference(s)