i want to teach my two years old son to recognise"brother" and "sister" but he don't have any siblings, so i use other person picture to show him example for him to understand.

after teach him the words, i must give him the sentences of the word for him to completely understand..

normally, english grammar is " what does your brother do?'' my brother is acrobat.
but i can teach him as " what does brother do?" brother is acrobat.
can i delete" your'' & ''my" ?because the picture of the brother is not his real brother. if cannot delete how am i going to make the brother sentences?

can u give me 6 sentences of brother for me because i give my son in 6 example sentence of the words. tq

2) Juicer or squeezer is used to squeeze the juice from a orange? Juicer or squeezer are used to aqueeze the juice from a orange? Which sentence is right?