Great ideas!!

Do keep in mind that merit badges need to be earned through registered merit badge counselors. If you want to become a merit badge counselor for any of those badges - and have sufficient subject knowledge/experience - you'll need to first register through your local Boy Scout Council office. Its an easy straight-forward thing - just filling out two forms (one to register you as a BSA leader, and another to sign up as a merit badge counselor).

Oh, and if you haven't already taken it, do take the Youth Protection training that is available on-line here: http://olc.scouting.org/info/ypt.html