Elenco Snap Circuits Light Kit with AC Snap Adapter Set Set includes Snap Circuits Light Kit and 9V AC Snap Adapter Endless electronics fun without using costly batteries Over 175 exciting projects: color-changing LED, lighted and glow-in-the-dark fans, strobe-integrated circuit, a color organ controlled by MP3 player Connect any MP3 player to the circuit board to watch a fantastic light display Makes an oustanding holiday gift, birthday gift or science project