What is redundant?

It may not be the easiest version of the game What is redundant ?, but we hope that even the smallest of our visitors will be able to cope with this game.
The aim of the game is that the child has learned to find common features between the different pictures. In this game, five levels, in each level the playing field 4 different picture posted. Three of them will have a common feature that unites them into one group. One figure is different from the others in that it is not included in this group.
Often children click on all pictures in a row, eventually finding the right. Of course, this is the simplest and easiest way to complete the game before the end of