How can I make my boobs grow?

how do I make my boobs grow bigger...and fast!? im still in my preteen years but im not big at all, and I mean I'm practically flat. I heard crunches work. do they?, and if so, how many do I do every day/night.

well it will come to you you r just a lil girl

NO exercises work to enlarge your boobs (Well I've never heard of anything like that). Why do you want big boobs anyway? Your genes decide what you get, so if the women in your family have big boobs then you are likely to grow them too but it's not always certain though, it really comes down to your DNA.

Happy Birthday Jennifer. Boob growth is controlled by hormones (plus genetics). At your age the hormones have just started working, but will continue to work for many more years. Sorry, but you will have to give it time, with no guarantee of size. Good luck.

You can't really MAKE them grow... you'll have to wait. The time will come soon.