How can I tone my stomach and thighs by may 31? And if im 13
please dont try to change your body or boobs at 13. you have probably just began to go through puberty, and that might not end untill your around 18 so youve got a good 5-6 years for all the changes your body is going to make. your boobs will get bigger and body will even out with time. your still growing, so let your body grow.
go find a killer outfit that accentuates your best features.
run a lot and do a lot of sit-ups