need t-shirt design ideas about UN

im in my school's club called Model UN which basically does what it says, model the UN. so i was thinking of helping design a t-shirt for this club of 100-ish student. last years shirt was an "S" with the blue UN helmet on it in the up right hand corner of the shirt. the "S" was for our school's name, Stevenson High School. any ideas? im not asking anyone to make anything