This prompt is adapted from Peter Bunzl’s creative writing prompt.
A Macguffin is a valuable object that drives the story. The hero and villain take action to try and possess it.
A Macguffin can be a magic object if your story is fantastical. It has emotional value for the hero and an importance in the villain’s plan. Its true value is often hidden at the start of the adventure. Sometimes it’s mentioned in the story title.
The S-shaped horn first appeared on EMG gramophones with the Mark X in 1929. The Mark Xa, which appeared late in 1930, had a 28-inch diameter horn, and the Xb (late 1933) measured 29.5 inches across the mouth. There followed (in 1935) the Mark Xb Oversize, at 33.5 inches. EMG acoustic gramophones were available into the 1940s. 
Beautiful cookies assorted close-up. background horizontal view from above 
Jewish wedding ring. Chased and enameled gold and filigrees, early 14th century, found at Colmar (Alsace, France) in 1863
Write this…
- Pick an object that attracts you and inspires a lot of ideas.
- Examine your Macguffin and decide what function it has in your story.
- What emotional value does it have for your hero?
- What is its importance in your villain’s plan?
- Write a scene where your hero discovers the object and gets a hint of its importance. Maybe the Macguffin is hidden in a dangerous place. Perhaps the hero has to collect clues to find it.
- Remember to mention how the character feels and what they know or guess about the object.