I have a cousin whose visted for the summer, & she is.... *sigh* she's 4 & her name's Amiyah & guess what every time she vists she has to spends at least one giorno at my house, & she vists atleast 3-6 times a year.
te can just go to a different room and do what te do for fun and ignore him/her. Go hang out with Friends o do something fun at home, something that keeps the time passing faster until your cousin leaves. te have to be calm and don't pay attention to the annoyance. If it's hard try to listen to Musica and pay attention to the music/song. Turn on your fave song and pay attention to the words. If if this annoyance makes te angry just take a glass of ice cold water and drink it all then do something te do to pass time faster. That's what I do when I am annoyed and it actually works. :)