Pic Lits is a great site which could be used for older grades, but the pictures could be used as writing inspiration for all grades.
http://www.piclits.com/compose_dragdrop.aspx
The site allows you to drap and drop words or write freestyle, you can keep digital copies of the writing or print them off.
Classroom Ideas:
1. Create shared poetry each day which can be displayed around the room.
2. Create pictures with adjectives to broaden vocabulary.
3. Use a variety of different poetry genre’s.
Here are a few I prepared earlier.