The development of a child under one year - the fourth month

What can a baby 4 months:

Learns his mother and prefers her to all others;
Smiles in response to your smile, begins to babble;
Pronounces the first syllable;
Captures a hanging toy or simultaneously with both hands and pulls it into his mouth;
Can arbitrarily keep the toy, shake and move them;
Raises his shoulders and head when lying on his back;
He raises his head at 90 °, when lying on his abdomen,
Selects the "favorite" and "unloved" toys;
When feeding, playing with a breast or bottle, supports it.
At this age a child can already feel fear, frustration, curiosity, and joy;
Laughs out loud;
Squeals of delight;
Firmly holding his head in an upright position, turn your head in all directions when sitting or lying down;
Turns (in one or both sides);
Can make swimming motions and moving around in bed;
Interested in his reflection in the mirror, smiling at it;
Laughs when tickled;
Calms down when he hears music.