[aurika]

These are our cats.
To sa nasze koty.

This is our truck.
To jest nasza ciezarowka.

This is our yard.
To jest nasze podworko.

This is your aunt and your cousins.
To jest Twoja (Wasza if there are more than one) Ciocia i kuzyni.

Great Grandma
Pra Babcia

This is your brother doing homework.
To jest Twoj (Wasz) brat odrabiajacy lekcje domowe.

This is Daniel at school.
To jest Daniel w szkole.

This is Daniel playing baseball.
To jest Daniel grajacy w baseball.
Or you could also say
Daniel gra w baseball.