Indicators of physical development of 1-3 months old infants: 1. The eyes can move 180° after moving objects, and the standard of visual acuity is 0.02. 2. The difference in the amount of milk starts to be obvious, averaging about 700 ml/day. 3.The baby sleeps 16-18 hours a day and night, and the reflexes of the newborn begin to disappear. 4.Hearing is more sensitive than before. The crying time decreases and the crying sound is differentiated. 5.The head can turn freely in upright position, and the head can turn 180°. 6.The head is raised 45°-90° when lying prone. 7.Fingers are loose, touching things with hands and can pull clothes. Can touch both hands together. 8.Eyes can immediately notice large toys and follow people around. 4-6 months infant physical development indicators: 1, can fix the sight, see objects about 75 cm away, vision standard is 0.04. 2, slowly used to eat with a small spoon feeding gradually added complementary food. Most infants begin to sleep through the night without breastfeeding. 3.Feces 1-3 times/day. Hemoglobin ≥110g/l. The baby starts to have front teeth. 4.Sit steadily by sitting, and lean forward slightly when sitting alone. Prone head up 90°, able to lift chest, arms support will turn over to supine. 5.Can stand straight by holding the armpit, and can support himself/herself in a short time when helping him/her to stand up. 6.Both hands can pick up the toy in front of them and can put the toy into the mouth. Toys are still slightly clumsy when changing from one hand to the other. 7.Like to put things in their mouths. Can tear paper, can play with hands and feet. 8. Will take a long time to examine objects and shapes. Begins to recognize people who are alive and familiar. 7-12 months infant physical development indicators: 1, vision standard is 0.2-0.25. 2, have regular stool at regular time, 1-2 times / day. Hematocrit ≥110g/l. 3. First milk molars begin to appear in the upper and lower jaws. Salivation is reduced. 4.Sleeps about 14 hours a day and night, will crawl on all fours, and the abdomen does not stick to the ground. 5.They can stand up by themselves holding the railing and sit down by themselves. He can squat down to get things by himself and will not reset. 6.Standing alone and holding objects by themselves can walk around. Walk alone for a few steps and jump into the arms of adults. 7 Finger coordination is better, such as opening a packet of candy paper. Will use his or her fingers to point to things that interest him or her. 8 Deliberately throws things away and picks them up again and rolls the ball toward others. Indicators of physical development for 13-18 month olds: 1. Most of the upper and lower 1st molars are coming in and the milk cusps are starting to erupt. 2. They can chew foods such as apples and pears and swallow them after stirring in a coordinated manner. 3.Frontal fontanel closes (normal position 12-18 months), and can start to express urination and defecation. 4.Walk steadily, can squat by themselves, can reset without holding objects, can go up and down stairs 2-3 steps by holding one hand, but not steadily. 5.Sense of taste and smell are more sensitive, have a sense of touch for objects, can throw the ball to go, but no direction. 6.Can use 2-3 blocks to build up a tall building, and can grab a crayon to use for painting. 7.Can hold a bowl with both hands and will try to eat by themselves with a small spoon. Physical development indicators for 19-24 month olds: 1. Vision standard is 0.5, can take the initiative to indicate urination and defecation, and basically do not wet their pants during the day. 2.The second molar begins to grow, with about 16 teeth, and sleeps about 12-13 hours a day and night. 3.Run 3-4 meters continuously, but unstable, get in and out of bed by themselves (short bed). 4.Will walk on toes (4-5 steps), but unstable, and go up and down stairs (5-8 steps) by themselves with one hand on the railing. 5.Begin to do jumping movements in place, such as jumping up with both feet (while leaving the ground). 6.Can kick a large ball, can squat and play, and can throw a ball with both hands above his head. 7.Be able to do movements according to the rhythm of music, be able to use glass wire through the buttonhole, and be able to build 5-6 blocks into a tower.