A gift or a present is an item given to someone without the expectation of payment or anything in return. An item is not a gift if that item is already owned by the one to whom it is given. Although gift-giving might involve an expectation of reciprocity, a gift is meant to be free.[from wikipedia]

A snack is a small portion of food generally eaten between meals.[1] Snacks come in a variety of forms including packaged snack foods and other processed foods, as well as items made from fresh ingredients at home.[from wikipedia]