Nick and Tesla’s Robot Army Rampage: A Mystery With Hoverbots, Bristlebots, and Other Robots You Can Build Yourself: Library Edi

When their uncle is hired as a consultant for a cut-rate amusement park that is building a Hall of Presidents knock-off attraction, precocious siblings Nick and Tesla discover a park employee's sinister plan and build a few robots of their own to foil him. Simultaneous.