How to write a story...

Imagine. Imagine like crazy and then imagine some more. Imagine all the exciting things you'd like to do and then imagine them happening in your town or village. Then imagine them happening to you which is much more likely now that they are happening near by. In fact it would be hard to avoid them happening to you... You'd have to stay indoors, under the kitchen table (stroking the cat, if you have got one handy) with the table-cloth pulled down low making a tent to keep you hidden from your stories!
Then when the stories start happening write them down in a book (any colour book will do) with a noisy pen. As a beginner you will find it helpful to stick your tongue out the side of your mouth a little way. this also convinces your mum and dad that you are deep in creative thought and not available to give advice on the complicated things that they don't understand but you do!
When you have finished writing your story read it aloud to see how it feels. You might want to read it very quietly at first until it gets used to the outside. then you can read it louder and to real people.
Try not to laugh too much at the funny bits.
It helps to dress up when reading your story; this is called being in character. Every-body dresses up in this way, even city bankers when they want to tell bank stories (these stories are rarely funny which is why bankers don't laugh much, except on their way to the bank). Soldiers dress up a lot, so do nurses and traffic wardens. Burlesque dancers are the exception to the rule; they undress to tell their stories.
At the end of your story put a very loud full stop.