My personal philosophy is that the Gospel is delicious, so is food. I try to use both in my lessons.
Today I taught about the destruction and scattering of the Jews, and also the prophesies of the second coming. Tough subject. Also, boooorrriiiinnggg. (If you're 14 or 15, anyway.)
So I cut up the scripture references and some quotes, put the papers in a bag, and let the kids pass it around and draw some out. "Dude, only take what you can handle." Snort. Suddenly they were eager-beavers.
Plus I had candy, and Cool's played the game before, so before I could even start the discussion, he took a handful of papers and started volunteering to answer questions with his scripture references and quotes. The kid's a natural leader.
I just played discussion moderator after that, and I threw a Starburst candy at anyone who made a comment, asked a question, or shared a scripture. Occasionally I would ask a question, and that would set things off again. Awesome! I LOVE candy. We had a real discussion and a nice snack.