Here are some catchy slogans and quotes: "Some bruises are on the inside. Stop bullying." "Don't make Victims - Make Friends." "Be a buddy, not a bully." "Help, Don’t Hurt." "Keep in mind to be kind." "Be nice, think twice."
And here are some more t-shirt ideas/designs that I found on google images: ~ http://funadvice.com/r/15pt9hkvkkd ~ http://funadvice.com/r/15pt9hkvlsj ~ http://funadvice.com/r/15pt9hkvmvs ~ http://funadvice.com/r/bq34vghtgl9 ~ http://funadvice.com/r/15pt9hkvpbg ~ http://funadvice.com/r/15pt9hkvqed ~ http://funadvice.com/r/15pt9hkvrh0
Here's a list of anti-bullying slogans you could put on a t-shirt: http://funadvice.com/r/15pt7hd7ipb
You can't bring me down today- Christina aguilera
"What goes around, comes around."
be a buddy not a bully :D