Does eatting cereal make you fat?

In specific eatting Raisin Bran cereal. Does it make you fat? I am not overweight I just don't want to be overweight. I've been trying to get abs! But it is taking too long. If I eat raisin bran cereal every morning will I be overweight? And what is the easiest way to get abs? What can I do at home instead of having to go to the gym or buy any excercise equipment?