Well, start by picking a toy that can be made menacing. A toy clown, for example, is already a bit spooky. Decide on the horror elements you want to include, like blood - curdling screams or strange apparitions. Then, create a plot where the toy is at the center of the horror. Maybe it was made by a deranged toymaker. Build your characters carefully, like a brave but scared protagonist who has to face the horror of the toy. Use descriptive language to make the reader feel the fear. For example, describe the toy's eyes as glowing with an otherworldly light. And finally, end the story with a satisfyingly terrifying conclusion, like the toy being destroyed but leaving a sense of unease that it might come back.