7 years and up.

In this second novel of the Nick and Tesla series, the precocious brother-and-sister duo find themselves solving another baffling mystery. As the story opens, their Uncle Newt takes a consulting gig at a cut-rate amusement park, engineering animatronic figures for a cheap Hall of Presidentsknockoff. One perk of the job is that Nick and Tesla have unlimited access to the amusement park all summer long'but the kids quickly discover that one of the park employees has a sinister plan. They'll have to build a few robots of their own to foil him! Readers are invited to join in the fun as each story contains instructions and blueprints for five different projects. Learning about science has never been so dangerous'or so much fun!

After a series of robberies strike Half Moon Bay, sibling sleuths Nick and Tesla build robots out of household objects in order to catch the culprits.