Japarrot! is a Youtube channel to learn Japanese for kids. Here is a basic dialog when introducing your family:
Greetings - Tadaima, okaeri.
Who is her? - Boku no haha desu. Hajimemashite. Ah Douzo. Ojamashimasu.
Presentation - Koko wa, boku wa hea desu. Ah Dare desuka. Imouto desu.
Who is him? - Onisan desu ka? Ie, chichi desu. Eh, Otousan? kakoi desu ne.
Compliment - Honto desu ka? Arigato gosaimasu.
First is a presentation to the house, "I am home" with Tadaima. You will be greeted back with an Okareri.
You introduce your mother to your friend, with Boku no haha desu.
A common reply is "How you do" or Hajimemashite. You apologize for the intrusion with Ojamashimasu.
You let your friend know, 'this is my room' with koko wa heya boku no heiya desu.
Your friend will then ask, who is she? with Ah Dare desu ka? You respond with Ha? Imouto desu? or 'she is my sister'.
She introduce herself with Hajimemashite, midori desu.
More presentations are done with Hajimemashite, tommy desu.
Your friend ask your sister for her name, Nan-sai desu ka? or How old are you. Her response, Nana sai desu. or _'_I am 7 years old'.
He reacts asking with Wakai desu ne? or 'You are younger than me?'
Dad enters the and you correct your friend ie, chi chi desu. Eh Otousan, kakoi desu ne'. Which means, 'No, he is my father. Eh! Your father, he looks quite cool'.
Dad reacts accepting the comment. Arigato Gosaimatsu or 'Thank you very much'.
Hope this basic dialog helps some greetings, introductions, and asking key questions like age and name.
For more lessons, follow me on the group.