Mom friends are always coming to me with "My kid does this... Is it normal??" So let's dive in.
What's normal kid speech?
First, you need to understand that speech sounds are acquired at different times, and in ranges just like with other milestones, such as crawling, walking, and getting their first tooth. As with learning to walk, there are stages to learning to talk and learning language. I won't go into too much detail, but your baby starts to babble and put sounds together between 6-9 months, and by the age of 4, you should be able to understand 100% of what your kiddo says. That's a lot to learn in just 4 years!