A game of logic and traction

This game was offered to my daughter to these two and a half years. She is now 3 years and some months, and just beginning to learn puzzle pieces fit together and do not understand the concept of contrast. Age 2 years indicated by the manufacturer seems to me very optimistic.
The game has 12 pairs, or 12 otherwise.

Positives
Cardboard is very strong.
The game is "auto fix", ie that only semboîtent contrary, no risk of error, therefore, if the child plays alone.
This game allows you to work both traction, fit the pieces of a simple puzzle, but also by seeking a contrary logic.
The difficulty of the game can be modulated by presenting a reduced number of opposite, or all puzzles.

Negative points
The background color for two contrary makes it hard for a young child who tends to merge the background and drawing, and will look for another drawing with the same background. The concept of being otherwise already difficult at this age, make his task more complicated. Put colored backgrounds was a bad idea. A white or the same color on all parts would have been much better.
Some opposites are really complicated to collect, as wrinkled and unwrinkled trousers or jacket open with dirty and clean, closed jacket (two contrary elements in the same image, one might therefore think that it is dirty / clean or open / closed while apparently it is rather wet / dry ...). I'm not a fan of big / small representative card.
It would have been nice to have written the opposite that is the part on the image or the back, some of which are not obvious.
Too bad that the list of opposites and the rule of the game or shown only on the leaflet, easily lost, and not on the box.

In conclusion
A game of logic and motor skills very interesting for children, but not as young as what the manufacturer says. For some parts, it will be essential to explain to the child what they represent, as they do not come to understand that the reverse is the only drawing.