Snap On Circuits Advanced Electronic Educational Kit, 9889 Models to Build Package size: 19.7 x 14.6 x 2.3" Weight: 3.3 LB 9889 electronic circuits diagrams available with a couple energy resources being experimented. Snap-on buttom design on parts that can be used and reused many times for solar science, electronic circuits and diagrams 42 electronic parts that supply solar panel, radio, buzzer, car, AA battery bank