By 7-9 months your baby will start exploring their surroundings by putting toys in their mouth. They may be able to pass a toy brick between their two hands. They will enjoy banging toys up and down on a table and will look for certain toys if hidden by you.
By 18 months they will begin to scribble with a crayon and be able to drop small toys into a box. They may be able to take off some clothing with some help.
By 24 months they will now know where things belong, toys go into a box and plates go into the press etc.
They will know to find a chair or box to stand up on if they can’t reach something they want. They will start to line up bricks or toys in a row. They will enjoy pushing or pulling toys along the floor.