Draw around a person. Get the group to either draw or write words/things that have people have said or done - or indeed they may have said, that would hurt others. Once finished, get the group to scrunch the figure up into a ball, perhaps standing on it or kicking it too. Then get them to open up the figure and ask them to get it back to it's original condition. No matter how much they try and how much they say sorry, the scars are still there. A discussion then takes place about how calling names, treating people differently can hurt. Also discuss what one person thinks is funny can hurt another.
paper big enough for someone to lie on. Pens/pencils.