Go to a gage gift store and buy some really creepy stuff and put it in his bed. or just put a collar on your beautiful tarantula and take it for a walk around your brother. better yet what i usually do to my mom is take a string or some strands of hair and run it across her face or arm and then hide. with that your brother will think there is a spider by him and scream like a girl....and record it and next time he tries to pick on you tell him you will let all of his friends hear him scream like a girl if he wont leave you alone....now that would really make him stop.....