Elenco Snap Circuits®: 300

No tools needed-just follow diagrams to snap the color-coded pieces together and experiment with lights, fans, sound and other circuits found in everyday electronics. Snap Circuits 300 has more than 300 projects and over 60 pieces, including an integrated circuit for a digital voice recorder, FM radio module, analog meter, relay, transformer and 7-segment LED display. Uses four AA batteries (not included).