Mental development Hearing.
On a familiar voice of mother at once turns even if is on the opposite side of the room.
Small motility and game.
Test game The child is in a prone position on a stomach.
You close his head a diaper.
Not to frighten the child, talk to him thus, suggest to take off a diaper.
The child, remaining in situation on a stomach, it can be exempted from the diaper disturbing to it by the hands.
Gradually capture of a toy matures..