This key box is ideal for encouraging the child's dexterity in a playful way. To open the doors and remove the blocks in the box, he must choose the key that matches the lock. Very clever . the back of the box is transparent so that the child can see the number and shape of the blocks that have been put in the box. Practical . the magnetic key ring can be attached to the handle so that the keys do not get lost. Included are 6 blocks and 3 keys. Watercolors. This product promotes: Hand-eye coordination and relationship of cause and effect.