Quantity   Component name
1 × Arduino Duemilanova
1 × Real Robots base
1 × MOD1007 sound module
1 × HC-SR04 ultrasonic range finder
1 × Amplifier 1W
1 × Micro switch
2 × LDRs Fiber Optics / Fiber Optic Transmitters, Receivers and Transceivers
1 × Hot melt glue
1 × wire, strip board, leds and stuff