The Word Game - you can make a story out of anything, but if you don't give your story a structure it will fall down. It doesn't matter how brilliant the idea is, it just won't work.
Beginning - the 'set up' - a sort of 'Once upon a Time'. Who is your main character? Where and when does he/she live? What is their problem or difficult situation? What do they need to do to change things? Why do they choose that course of action? What makes them determined to try and change things?
Middle-The Crisis - this is the 'oops!' What obstacles get in the main character's way? (It could be people or circumstances.) Think of about three things that cause problems for your hero / heroine. Each one should be bigger or more difficult than the last one (remember Jack climbing the beanstalk three times and getting closer to being caught each time!)
THINK! THE SORT OF PERSON YOUR HERO / HEROINE IS WILL AFFECT HOW THEY COPE WITH THE CRISIS AND WHAT THEY DO TO GET OUT OF THE SITUATION!
eg, Jack in Jack and the Beanstalk was too lazy to go to market and sell the cow. If he had not been lazy, he would have ignored the old man and walked on! This would make a very different story! Then, when he was in the giant's castle, he hid rather than tried to fight the giant, as Tom Thumb might have done. Why?
End - the resolution - this is the 'phew!' - or the 'aaaagh!' if you don't like happy endings!
How the hero / heroine's problems are sorted out. In the middle section, the third obstacle has to be the 'final straw' that forces a solution to the hero's problems: the giant chases Jack down the beanstalk so Jack chops the beanstalk down. Jack and his mother are rich, they have Jack's father's treasures back, and the evil giant is dead. BUT, really, Jack should have learned something as well, i.e. not to be so bone-idle. I sometimes wonder if he was any better for his adventures, or if being rich made him even lazier. But then, that's another story..!
Note: There are other sorts of story. This is just a simple 'starter' one.