Amanda was terrified. Sure, she and her friends had built a huge tree house and an awesome haunted house together - but now she was in way over her head. Those projects had been for fun - but this one was going to be marked! She and her lab partners have to do a class project for the School Science Fair - but they have absolutely no idea where to start or even what to do. Have they finally met their match?Meanwhile, the boys have big problems of their own, and the outcome of their project could mean life or death! OK, maybe not actual death, but they could end up cold, wet and hungry, and with no electronics...for a whole weekend!Join the Project Kids in their third big adventure as they come together to unravel the mysteries of Mice, Men...and Marshmallows.