Team Building Task-The Cup Challenge - take a rubber band and tie 6 strings to it (though I think 5 would work if you want smaller groups). Participants must use only the strings to move 6 cups into a pyramid formation. You can make this a competition between the groups or give them harder cup moving tasks.
The "beware of dog" sign has been used since the days of the Roman empire, which was a super long time ago (my high school Ancient History teacher would cringe if he saw this). So it's no surprise that it's gotten a bit stale. Here are some creative ways to let the world know that a dog lives in your house.