On the door to the shop, there's a sign that says "Swimming Pool Closed."
When you're exiting the shop, taped to the wall is a piece of paper that says "If your underwear doesn't smell like cutting oil, get back to work!"
And then there are the various posters on the walls w/pics of little kids with things like: "I sit when I eat," or "I brush my teeth."
A couple weeks before build, when we were prepping, one of our members went into the shop wearing his bike helmet, and I pointed out the poster in the shop that showed a kid wearing a helmet (for safety), and one of us said something to the effect of: "I like how YZ is doing what the poster says..." ::shrugs:: Hey, he was being safer than the rest of us, since we weren't wearing helmets.
Another time, we were looking through the posters, and read out loud: "I brush my teeth." One of the seniors then exclaimed, "Oh crap! I forgot to brush my teeth this morning!"