How can I gain weight in my thighs and buttocks?

IM 13,5'1 AND I WEIGH 107
MY LEGS ,WELLZ MY THIGHS ARE LITTLE LOLZ AS you MIGHT ALREADY GUESS AND I want to GAIN WEIGHT AND GET A LIL THICKER FROM THE BUTTUX AND THIGH AREA BUT I WANT TO KEEP EVERYTHING TONED OUT
what are WAYS OR TECHNIQUES THAT I CAN GAIN THE WEIGHT IN THAT AREA and KEEP TONED?

Hi,

Unfortunately there are no foods you can eat to gain weight on specific areas of your body.

If you eat more calories than you burn and thus gain weight, part of this increased weight may go on to your hips, butt, stomach and thighs.

Bottom Line: Just as we can't choose the areas from which we shed weight, neither can we choose the areas where we gain weight

eat a lot of bread and butter * so I heard*