Yes, Kegels. If you don't know what those are, just flex the muscle down there, like you are stopping your urine.
I would be careful putting anything on your vagina, especially stuff that isn't meant to be there--like food. You may end up with an infection.
Otherwise, I have heard there are surgical options, especially for women who have had a lot of kids, so things are really stretched out down there. If the exercises don't work, you may consult with your gynecologist about the surgery or other medical options.