Writing Prompts

Just ran across this tumblr with some cool writing prompts by a writing teacher. I'm not a member of tumblr, but might join just for this.  Pretty cool:
http://writingprompts.tumblr.com/

"These are some of the daily writing prompts that I use in class. The prompts and pictures are scraped together from so many sources - forgotten websites, old journals, overheard conversations, the crusty recesses of my hard drive - that attribution is difficult. I've tried where I can, but if you know how any of them should be attributed or have a problem with one of them, please."