What mentoring materials or activities do you use with youth and children at your church?

So, we're just beginning with the process of pairing adults and children into mentoring relationships as part of welcoming and guiding them to participate in the Lord's Supper as well as the full ministry life of the church, but we are sorely in need of more options or resources for mentors to draw upon.  Currently, the "I Believe" mentoring book from Faith Alive is our only resource for junior high kids...Do you know of others?  And what other activities or faith forming events would you recommend besides "going through the book?"  Junior-highers are a first priority right now, but the same questions also apply for our early high-schoolers and elementary kids as well....I'd love to hear what you've done!