Exercises for toning your Abs

rbn_held

I have lost 11 lbs so far and can notice in my legs and hips mostly, but my biggest trouble areas are my Stomach and my back (bra area). Does anyone have any good exercises that I can to do tone up these areas? I don't have alot of money to buy DVD's and such so am looking for exercises that don't require alot of equipment. Any ideas would be greatly appreciated.

Thanks in advance