craftgrrl | blah, blah, apologies for the text only

Background: This year I am a Freshman Challenge Counselor. At the Freshman Challenge, freshman are split into groups, and they go to a local camp to bond and do fun activities like shaving cream fights. Because I am a counselor, I am in charge of a group of 8-10 freshman. We are the Green team, and you're supposed to create a lot of team spirit in your group with cheers and such. A lot of people make tshirts for their groups (each group is a different color), but I don't really want to do that because they get a Freshman Challenge tshirt anyways, and they would probably prefer to wear that. I think they recieve green arm bands, but I wanted to make something else for my group.
Question: What would be awesomely cool and green that everyone would want to wear? Bandanas are overdone. Maybe sashes? Or green tube socks? I know you girls will have some sweet original ideas. Something unconventional. I'm normally a very creative person, but for some reason this has gotten me stumped. Merci en avance!