They can eat one big can of black olives in one setting.
They found so much fun in eating it as they can stick 'em into the tips of their fingers lol.
Here are some benefits of black olives according to ehow.com.
Black olives are a cholesterol free food and contain very little fat. The fat that is contained in olives is monounsaturated fat and there are only seven calories in one large black olive. These fruits can make a tasty snack addition with little health concern.