This is actually a pretty early Banksy piece from back in 2007, found just outside Glastonbury Festival. The artwork shows a police officer patting down a young girl in a stop and search scenario. Next to her sit a teddy bear and pink case, contrasting the police officer on the other side.
The message here is likely that police should not criminalise children - in 2009, 939 children under 10 were stopped and searched, none of whom were arrested.
We've printed this Banksy art on our Men's T-shirt.