Mr. Snoofuls Ransom (d20)
A young girl asks the adventurers to get her doll back from the "monsters" who stole it. Upon investigating¸ you discover the cave is full of wood cutouts of monsters¸ harmless traps¸ and fake ghosts. Her brother sits at the end¸ dressed as a golbin and commanding an army of paper skeletons.
This is a lighthearted adventure that is not meant to be taken too seriously. It serves as a great decompression quest to be used after particularly harrowing adventures. The world is not going to end¸ nobody will die¸ but you might lose some cookies along the way.