Ok I'm 12years old and Im gong to a summer camp in July Last time I went I felt very small and I cant gain any weight im 80lbs and 5ft how can I get a bigger butt thighs and hips?

dont stay the size you are lots of girls would want to be your size its ok to ur size but truthfully the best way is to get ur period i had ur same problem until i got mine and if u already got it be patient its gona catch up