This sorting game with keys by Essentiel is a great educational game. It consists of a key box in which the appropriate shapes must be assigned. This key box is ideal for developing your child’s skills in a playful way. In order to open the door and remove the blocks in the box, the right key must be found for the respective lock. The back of the box is transparent so your child can see the number and shape of the blocks that have been put into the box. It is particularly practical that the magnetic key ring can be attached to the handle so that the keys are not lost.