I have just discovered the amazing world of "word clouds" (or wordles). ABCya has a super kid (and teacher) friendly version. I just whipped up a quick one about some of my favorite things in the classroom, but you could use them for just about anything. Some ideas I had were: content-specific vocabulary, poetry, a gift for a volunteer, an "all about me" study, to summarize the main idea of a book, to introduce a new concept or unit of study and much, much more.
Here is my teaching word cloud: