What are some foods really low in calorie but taste good enough to munch on..?

im bored a lot and have a habit of eating when i do just so I have something to keep me busy... I usually eat ice cream or pizza or just drink chocolate milk... I only eat thses because im bored... plz dont give me things that I oculd do.. im only wondering what kind of foods t oeat that are made to be low cal (no fruits or veggies)...???