Babies are likely to have at least one method of locomotion by this month (i.e., crawling, army crawling, rolling over and over, bottom shuffling), which supports their curiosity since they can now go nearly everywhere. They may also be able to stand up using furniture as support.
Parents of new crawlers often find themselves saying “no” multiple times a day. Babies might even imitate your head movement when you say “no,” but they may not stop their activity as a result. The baby’s curiosity increases significantly, creating a natural tension between their desires and your instructions.
Language comprehension is now much better and the baby understands commands and is also able to imitate one or two animal sounds. Their understanding of time continues to improve, increasing their ability to anticipate events. For example, your baby might realize now that when you grab your purse, it is because you are leaving the house. Learning to anticipate events also means they learn to wait, but often only for short periods.