my brother make me angry

Today,my brother make me angry becouse he open my pencil box and take my thing.
Then he see he want of the makanic,he ran to me and ask:"sister can you give me this makanic?"Then i say :"cannot!" he go back to my table.
Then he lagi ask me:"sister can you give me this makanic?"
Then i say :"I say cannot!"
Then he cry... .He say if you don't give me the makanic i will tell mother.
He crazy right!!!!