Crayola has a great go-green contest that I found on Facebook:

School might be out for summer, but that doesn’t mean you have to put away ALL your pens and pencils! Crayola is encouraging kids to get creative this summer by drawing their dreams for a greener planet for their “How I Dream in Green.” To enter your students the contest, long into Facebook and visit:  http://tinyurl.com/32dnzav. Ten winners from grades K-8 will be named as Crayola’s first Green Team members and win a trip to Crayola headquarters in Easton, Pa.