Investigate a whole world of circuits—three instruction manuals contain directions for a total of 511 projects! Directions are easy to understand with large color diagrams and each is labeled with a clear objective. For example, the objective when building a reflection detector is to determine if a mirror is present—this project uses a lamp and photo resistor in its circuit. Play music, sound alarms, launch saucers, build radios, apply touch sensitivity, use capacitors, adjust a metronome, amplify music, write a telegraph message, build a lie detector, and much more! A software CD is included with 73 additional projects that allow students to “see” the electrical signals in the circuits just like engineers do by using oscilloscopes and spectrum analyzers. Interface cable is included. Four AA batteries are required and available separately. System requirements: Windows 95 or later.