Here are some revision videos and a new thing: age. To tell the age we use the verb "to be" and we have two options:
1- I am 24
2- I am 24 years old
(but it's not correct to say: I am 24 years)

This is Mia. She's 26 years old and she's from Brighton.
This is Toby. He's 28 years old and he's from London.
Toby and Mia are friends.
This is Amy. She's 24 years old and she's from Sidney, Australia.