Here are some elements to create the fun:
Have the families in your ministry offer to bring in baked items and goodies. Drop them off at the church the morning of your break room blitz. Have a team of people ready to make the delivery and really decorate the place up. Use balloons, streamers, etc. to really create an element of excitement in the teacher lounge.
Have kids prepare signs on the computer or hand made that say things like, "thanks for all you do", or use inspirational quotes about teachers placed around the room. "Our teachers are the best"
Have a give-a-way. Place a sign up bucket in the lounge where teachers can enter to win gift cards to Wal-Mart or the teacher supply store. You're not collecting address or names...just showin' the love.
Place the fresh goodies, signs, and treats in the breakroom to jazz up an otherwise uneventful day for the teachers in your community. They'll love you for it.
Have you done anything creative to thank the teachers in your community?