Kidpower Trust offers school holiday programmes that teach children how to develop their boundary setting skills in a fun, age appropriate environment. The programme uses role playing techniques and positive experiences to teach children how to handle difficult situations. These programmes have helped lots of kids live better lives, and go way beyond the usual school holiday programme.
Kidpower Teenpower Fullpower Trust is a nationwide support network which helps young people deal with conflict and bullying without aggression. It also provides resources to help young people be aware of how to keep themselves emotionally and physically safe. Their website is a great resource; give them a call and see what they can help you with in your city (they currently serve Auckland, Nelson, Christchurch, Wellington, Marlborough and the Lower South.