I do a lot of seminars, in-store promos and presentations at bass clubs as well as captain for a high school team. I have found that the Keep it simple principle works best. If these kids have a very limited knowledge of fishing keep it very basic or they will be more confused than when they got there. I would show a few basic knots, and rigs that are simple like a texas rig worm, wacky style trick worm or Senko style bait, or just chunkin and winding a crankbait like a KVD 1.5 or Rat L Trap. Also show them the basic weights and hooks they will need. Good Luck, and Have Fun