I thought this book would consist of short tidbits of contrived plot between experiments and was willing to put up with that, thinking it might be fun for my son--but actually, the book does have a real plot, and a few gadgets are thrown into the mix along the way. Much of the story is farfetched on both a narrow level (such as the young protagonists being on the same level about gadgets they can build, looking at a couple of objects lying around and suddenly having a Eureka! moment together as they realize what those objects can become) and a broad level (the typical black SUV following the kids around, the idea that they would immediately stumble on a complex situation in a mysterious old house their first day on vacation), but that doesn't make the story much less fun. It's pretty entertaining, actually. The diagrams and instructions are fairly clear, and the projects have a reasonable level of complexity for the target age group, particularly given the strong suggestion to involve adults. There is still some mystery remaining at the end of this book--hopefully, Nick and Tesla will work toward gaining more information about it in their next adventure.