Er... creative and just plain weird.

Dip a maggot in paint and watch it wander across a page.  Use different colors of paint and you get...

wait for it...

Maggot Art!

The description on their web page really sounds much more wholesome:

Maggot Art™ is a fantastic new teaching tool for use in the elementary school setting.  Children get hands-on experience with insects that most people find truly disgusting -- maggots -- while creating a beautiful piece of artwork to share with others.

Found on Kukla's blog.