Around 6-10 months, children begin to babble with sophistication.
From birth to six-months, babies usually let out reflexive sounds (spit, and the basic use of lungs) just to adapt to it. From 6 to 10 months, the infant enters a stage which a process called “canonical babbling” takes place. In this process, the child begins to experiment and test out different syllables and rhythms that they can expand their language with.
From 10-12 months old, the baby reaches the milestone of crawling and advanced hand-eye coordination, which helps them to grab and control their surroundings better. In the range of 12-24 months old, the infant essentially transitions to a toddler. He or she learns a lot more as their brain rapidly develops, and they remember more.