A large group game that works well for focusing a group in an active way. Jockeys works with any age and any number, as long as you have space!
When working with young people, knowing how to lead games well can be a real string to bow and helps a lot with behaviour management.
What prepares a person for repentance?
The insight into one's personal guilt produces a longing to better oneself; this is called contrition. We arrive at contrition when we see the contradiction between God's love and our sin.