In addition to crying, which is the only way to communicate, babies at this stage also begin to recognize humor and respond with laughter. They will burst into laughter when they suddenly see your face when you play “peek-a-boo” with them or see a spring toy pop out of a box. You should create activities that encourage your baby, this will help them improve their cognitive and language development.

Your 15-week-old baby can recognize you. He or she can smile and “talk” to you and everyone around him or her. However, he or she will give preference to mom, dad, and other people who are close to him or her every day. Not only that, he or she can search for you in the room and hold out his or her arms to reach for you, and grin when he or she finds you. He or she can even sense that you are nearby by smell or voice.

At 18 weeks, your baby will discover some new games, such as playing with his hands and feet. You will see him repeatedly holding his hands close to his face to observe, or holding one hand and then pulling the other's leg. Sometimes you will even see him crying when he wakes up.

At this time, you can start to train your child to recognize the time and habits of sleeping at night. Repeat actions that can stimulate your child to sleep more easily every night such as bathing your child, reading stories to your child, breastfeeding, singing lullabies... To create this habit for your child will take a lot of time and effort, so you should share this work with your husband or caregiver.