Of course there are times when we all feel a bleakness coming on. If we don't do something for ourselves at these times, then everything just becomes blacker and blacker.
To have fun is a basic need. (Even animals have fun when they frolic with each other. From pictures, one gets the feeling that they also enjoy roaming around on their own in the forest, tumbling in the grass, standing on a promontory looking out.)
When we are small, we may need a little help from adults but once we grow up, we know what make us happy....what we like to do....what we enjoy.... When we enjoy the moment or take great pleasure in some activity, we are having fun. For some people having fun means solving a cryptic puzzle or a complicated mathematical problem.
There may be times when one may feel that having fun is not right - one has nothing to feel happy about....enjoying oneself will only anger the gods....one does not have the right to have fun....where's the time to have fun....I'm too old and too tired to have fun...if we take time out to have fun, all that has to be done is only going to pile up, and then we're in for a great deal of stress trying to finish everything...
Of course this would beg the questions: Who said we have to do everything ourselves and at this very moment in time? What about priorities?
Here's the thing. Fun is absolutely free. It is a gift we give ourselves. Besides all the good fall-outs of having fun, it is absolutely essential for daily living.
'Never, ever underestimate the importance of having fun.' ~ Randy Pausch
While thinking about what would constitute fun, I found a lot of things...I'm sure you'll be able to put down more things on your list.
So, fun would mean...
Spontaneously doing something or going somewhere
Freedom from all the shoulds and have tos
Silliness
Outrageousness
Going with the flow
Laughing with friends
A pyjama evening
Indulging a childhood fantasy
Having a carefree day
Not planning every moment of every day
An unplanned outing with maybe hot chocolate thrown in
Dancing
Playing
Enjoying new experiences
Curling up with a book
Watching children play
Being by myself and pottering around the house
Gardening (could also be sitting in the garden and watching Nature)
We need to check the fun quotient in our lives quite frequently...