Look out! There's a sleepy, creepy, deeper-than-you'd-think mud puddle on the preschool playground, and it has swallowed up a pizza van, a fire engine . . . even a tow truck! But don't worry, this group of clever preschoolers knows just how to rescue them! The talented duo who brought readers the popular Counting Crocodiles and The House That Drac Built have created an irresistible playground adventure.