Which is correct? Backyard, back yard, or back-yard?
It’s usually a good idea to incorporate more than just the sense of sight in descriptive writing. Just be reasonable about it.
Description is different from narration, but that doesn’t mean it can’t include action.
Here’s another good writing assignment for middle or high school aged students. Feel free to use it; it’s worked for …
Writing descriptively requires making choices. A creative, observant writer can find dozens, hundreds, maybe even thousands of details to describe in any scene, person, or object. But good description doesn’t simply mean giving as much detail as possible. It means selecting the most important details to include and presenting them vividly and memorably.