Inkblots can be the inspiration for poetry.
Spots of ink are dropped onto a piece of paper. The paper is folded in half so that the wet ink will smudge and form a mirror reflection on the two halves. The piece of paper is then unfolded so that the ink can dry. (wiki)
This inkblot game is also called: Gobolink.
Gobolink can be played as a group game or can be an individual activity.
See the actual Gobolink book here:
1. Make an inkblot.
2. Fold it in half to create a mirror image.
3. Write a poem about it.