To talk about your age, you can say, for example, I am eight years old or just I'am eight. When you want to know someone's age, you can ask them How old are you?"
Here are some examples.
I'm eight. How old are you?
I am seven.
How old are you?
I am nine years old!
Let's count together!
We use the numbers to talk about our age. Can you count from one to twelve? Can you count from twelve to one?