Endings are hard. Try thinking about endings as punctuation:

• Period: it’s all neatly tied up and finished.
• Question mark: a few things are left open – whatever will happen next?
• Exclamation point – no one expected that, SURPRISE!!!!!

Take a look at one of the stories you have written recently–or, you can do this as a collaborative exercise using someone else’s story (swap with a friend or a sibling, or choose one from Stone Soup). What kind of ending does it have? Can you try rewriting the ending in one of the other styles? Which one works best?