My son emailed me with this link...

Create poems, for Twitter, using  magnetic words.

To use...

• drag words onto the 'page'
• click the swap words button, to change those words you don't wish to use
• write/compose the text
• Post the poem on your twitter account (if you have one) or publish to the Twitter Magnets Account

Note: Snippy or other screen capture tools could be used to record the end result without publishing to twitter.

Try it out at http://www.twittermagnets.com/.