Maybe you could start each session off with the Mystery Detective (someone dressed up like a detective-drench coat, dark glasses, magnifying glass, bible, etc.) that would do a short skit with the teacher or a dialogue each week to perk the kids interest and pull events together. Make it humorous. Each week he could be searching for something. Sometimes he could be completely off track because he's looking for something only to find out he mixed up the meaning and finds the answer is something he didn't expect.