It is difficult to say what one thing will always be fun, as different people have different interests and preferences. What is fun for one person may not be fun for another. However, some activities that are generally considered fun and enjoyable by many people include spending time with friends and loved ones, engaging in physical activities or sports, pursuing hobbies and interests, and experiencing new and exciting things. These activities may not always be fun, but they are often seen as sources of enjoyment and happiness.