Perhaps pointing out the sad fact that even the best of intentions can easily become political and get nasty, Banksy's Peace Vs. Love shows two hippies in a protest board fight. With one hippy viciously fighting for Peace, and the other seeming to surrender after putting up a fight for Love, the whole piece is smothered with irony! The piece first appeared at British festival, Glastonbury in 2010.
Some people might not think this is appropriate for kids, but we'd have to disagree when you look at the meaning behind it. The artwork is printed here on our Peace Vs Love kids t-shirt.