Friendly Halloween characters visit one another to deliver Halloween treats without being seen. When each door is opened, it reveals a different character being "booed," while the giver of the BOO is hidden behind the door flap. On the next spread, the character who has been BOOED goes on to BOO another friend, and so on. The final spread reveals all four characters, who have previously been BOOED, as they head to one final door with a mirror behind it. Guess who they BOO? It's YOU the reader.

"Booing" rose in popularity during the pandemic when Halloween activities such as school parties and neighborhood gatherings couldn't take place. Booing became the ultimate socially distanced way of having Halloween fun and showing the special people in your life your appreciation. Even though this is primarily a US activity, the concept of characters giving a treat to a friend will resonate across the globe.