When Duncan arrives at school one morning, he finds a stack of letters, one from each of his crayons, complaining about how he uses them.

You've played the game. Now read the legend of how it all began...Long ago, in an ancient and distant realm called the Kingdom of Backyard, there lived a warrior named ROCK. Meanwhile in the Empire of Mom's Home Office, a second great warrior sought the glory of battle. And his name was PAPER. At the same time, in the Kitchen Realm, in the tiny village of Junk Drawer, lived a third warrior. They called her SCISSORS. These three were the strongest,...

Monkey has a big box, which he tells Cake has a cat inside, but only when the box is closed; Cake suggest that maybe it is a dinosaur instead, and the two friends puzzle over how they can solve the problem of finding out what is in the box, if it is always empty when opened.

The crayons are ready to celebrate Halloween, but the don't know what to say when they knock on the door!