Why does my sister act this way...?

hey, well i had the same problem but my problem gets even worse i am the middle child. i found out that the only reason why they do this is because they dont get the right or enough of attention. they want to bother you becuase they're jealous. talk to het with your parents. my sister grew out of it through out the years. remember: communication is the number one thing. hope i helped. goodluck. peace! <3