(1) begin to know a person: Control to 7 months, the child sees familiar person broadens smiling face, the person that sees those are not known is being stared at look or cry be troubled by, this shows the child has the capacity that knows a person, the affection growth that also indicates the child must comparative fast. To the child of those be shy with strangers, answer to go to the outside as far as possible, play together with the child, see an animal, slowly not be shy with strangers. If close in the home all the day, do not contact with the outside, come out very hard from the disengagement in the circle of be shy with strangers.

(2) the bud of self-awareness: Arrived this period, infantile curiosity is very strong, see the thing all round wants to catch. Catch do not let others take away with respect to effort in one's hand, if just take away his meeting to cry,be troubled by rise, this explains self-awareness is budding.

(3) intellective: To this period, the baby can look up, can sit, can turn over, still can capture armrest to wait stand up, because the line of sight is opener than sitting, so, the baby is very glad.

(4) imitate: Arrive this phase, the baby liked to imitate, mom knocks a thing to look to him, the child can be imitated immediately make similar action, show intellectual growth is normal.

(5) memory: The baby arrived 89 months begin to have memory. But can write down only some open-and-shut thing. For instance the toy drops the ground from the bed, can search a little. But take other toy when adult, neglected the job that a moment ago produced immediately.