Have the students make their writing "more colorful" by using paint strips. Write a boring adjective at the bottom of the paint strip on the most boring color. Give each student a paint strip and they can use a thesaurus or a word wall to think of "more colorful" words for their strip. Put the best word on the brightest part of the strip. Hang all of their strips on the door and they can use those words to help "make their writing colorful!"
Mystery key stories - each tag includes a writing prompt dealing with a key and is attached to a real key. Students randomly select a key and write a story. This blog post includes some great story lines to include on the tags!