We did something similar for Easter, and so here is a Halloween version. I know, it's seems too early to start working on Halloween crafts! It is still 90 degrees here in Cincinnati. However, all of our friends on Pinterest are already pinning Halloween stuff, so I figured why not get ahead of the game and give everyone a free printable.
Here's the directions, leave the "You've Been Booed" note, along with some candy for a friend or neighbor. Be sure to stick the "We've Been Booed" sign for them to hang as well. Then, they continue the string of booing by turning around and doing it for one of their friends or neighbors. It's a good way to spread the Halloween spirit! But remember, do not tell them who the Boo is from.
To print, just right click and save image, then print as a full sheet photo.